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DEN - STL

$39 Find cheap flights from Denver to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to St. Louis departing on 7/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 7/6
Sat 7/13

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 43,995,393 times on KAYAK, and here is why:

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Cheap flight deals from Denver to St. Louis (DEN-STL)

 
These are the cheapest deals for flights from Denver to St. Louis currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Denver to St. Louis

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Denver to St. Louis.

Recent one-way flight deals from Denver to St. Louis

Only flying one-way? Below are some of the best one-way flight deals from Denver to St. Louis found on KAYAK recently.

Recent last minute flight deals from Denver to St. Louis

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Denver to St. Louis.

Recent direct flight deals from Denver to St. Louis

The latest deals for direct flights from Denver to St. Louis so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Denver to St. Louis

Find recent round-trip train or bus tickets from Denver to St. Louis.

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
8:44 am - 11:50 amDEN-STL
2h 06mnonstop
8:00 pm - 9:28 pmSTL-DEN
2h 28mnonstop
$47Frontier
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Tue, Aug 13 - Wed, Aug 14
6:15 am - 9:25 amDEN-STL
2h 10mnonstop
8:00 pm - 9:28 pmSTL-DEN
2h 28mnonstop
$53Frontier
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Mon, Aug 12 - Wed, Aug 14
9:51 am - 5:22 pmDEN-STL
6h 31m1 stop
8:02 pm - 9:25 pmSTL-DEN
2h 23mnonstop
Fri, Aug 9 - Sat, Aug 10
7:02 pm - 10:11 pmDEN-STL
2h 09mnonstop
5:30 pm - 10:52 pmSTL-DEN
6h 22m1 stop
$142United Airlines
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Tue, Aug 13 - Wed, Aug 14
5:50 pm - 9:29 amDEN-STL
14h 39m1 stop
8:57 pm - 10:20 pmSTL-DEN
2h 23mnonstop
Thu, Jul 4 - Thu, Jul 11
7:07 pm - 10:15 pmDEN-STL
2h 08mnonstop
5:34 pm - 10:52 pmSTL-DEN
6h 18m1 stop
$187United Airlines
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Fri, Oct 11 - Fri, Oct 18
5:10 pm - 11:20 pmDEN-STL
5h 10m1 stop
6:30 pm - 10:50 pmSTL-DEN
5h 20m1 stop
$196Delta
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Thu, Jul 4 - Mon, Jul 8
5:45 am - 2:56 pmDEN-STL
8h 11m1 stop
6:30 pm - 10:50 pmSTL-DEN
5h 20m1 stop
$206Delta
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Wed, Jul 3 - Mon, Jul 8
6:30 pm - 8:50 pmDEN-STL
25h 20m1 stop
5:20 pm - 3:36 pmSTL-DEN
23h 16m1 stop
$220Sun Country Air
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Fri, Jul 26 - Mon, Jul 29
8:05 pm - 8:01 pmDEN-STL
22h 56m1 stop
6:15 pm - 9:23 amSTL-DEN
16h 08m1 stop
$235Sun Country Air
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Fri, Jun 21 - Sun, Jun 23
6:20 am - 9:29 amDEN-STL
2h 09mnonstop
$39Frontier
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Wed, Jul 3
11:46 am - 2:53 pmDEN-STL
2h 07mnonstop
$44Frontier
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Thu, Sep 5
6:35 pm - 12:59 amDEN-STL
5h 24m1 stop
$88Delta
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Wed, Sep 4
7:05 am - 1:24 pmDEN-STL
5h 19m1 stop
$98Delta
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Thu, Sep 5
4:54 pm - 10:48 pmDEN-STL
4h 54m1 stop
$99American Airlines
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Fri, Sep 6
5:50 pm - 9:29 amDEN-STL
14h 39m1 stop
$101Sun Country Air
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Thu, Jul 4
7:45 am - 2:36 pmDEN-STL
5h 51m1 stop
$124United Airlines
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Sat, Jul 6
9:25 am - 12:40 pmDEN-STL
26h 15m1 stop
$138Sun Country Air
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Thu, Jun 27
6:10 am - 2:16 pmDEN-STL
7h 06m1 stop
$178United Airlines
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Sun, Jun 16
6:55 am - 9:54 pmDEN-STL
13h 59m2 stops
$251American Airlines
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Fri, Jul 5
6:00 am - 9:59 pmDEN-STL
14h 59m2 stops
8:02 pm - 9:32 pmSTL-DEN
2h 30mnonstop
$126Frontier
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Mon, Jun 10 - Wed, Jun 12
11:59 pm - 2:18 pmDEN-STL
13h 19m1 stop
8:02 pm - 9:32 pmSTL-DEN
2h 30mnonstop
$128Frontier
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Fri, Jun 7 - Wed, Jun 12
10:11 am - 5:11 pmDEN-STL
6h 00m1 stop
8:02 pm - 9:32 pmSTL-DEN
2h 30mnonstop
Sun, Jun 9 - Wed, Jun 12
10:11 am - 5:11 pmDEN-STL
6h 00m1 stop
8:02 pm - 9:32 pmSTL-DEN
2h 30mnonstop
Sun, Jun 9 - Wed, Jun 12
12:40 am - 9:15 amDEN-STL
7h 35m1 stop
4:02 pm - 10:53 pmSTL-DEN
7h 51m1 stop
$449Delta
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Tue, Jun 11 - Wed, Jun 19
1:25 pm - 4:29 pmDEN-STL
2h 04mnonstop
9:05 am - 10:29 amSTL-DEN
2h 24mnonstop
$552United Airlines
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Mon, Jun 10 - Thu, Jun 13
12:55 am - 9:10 amDEN-STL
7h 15m1 stop
5:25 pm - 10:53 pmSTL-DEN
6h 28m1 stop
$586Delta
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Fri, Jun 7 - Sat, Jun 15
5:02 am - 3:41 pmDEN-STL
9h 39m2 stops
5:31 pm - 9:54 pmSTL-DEN
5h 23m1 stop
$605United Airlines
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Sat, Jun 8 - Sat, Jun 15
12:58 pm - 6:41 pmDEN-STL
28h 43m1 stop
7:32 pm - 11:02 amSTL-DEN
16h 30m2 stops
$803Alaska Airlines
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Tue, Jun 11 - Sat, Jun 15
8:13 pm - 11:59 pmDEN-STL
26h 46m2 stops
2:36 pm - 11:02 amSTL-DEN
21h 26m2 stops
$806Alaska Airlines
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Sat, Jun 8 - Wed, Jun 12
8:44 am - 11:50 amDEN-STL
2h 06mnonstop
8:00 pm - 9:28 pmSTL-DEN
2h 28mnonstop
$47Frontier
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Tue, Aug 13 - Wed, Aug 14
6:15 am - 9:25 amDEN-STL
2h 10mnonstop
8:00 pm - 9:28 pmSTL-DEN
2h 28mnonstop
$53Frontier
Find Deal
Mon, Aug 12 - Wed, Aug 14
6:20 am - 9:29 amDEN-STL
2h 09mnonstop
3:47 pm - 5:16 pmSTL-DEN
2h 29mnonstop
$57Frontier
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Wed, Jun 19 - Tue, Jun 25
6:26 am - 9:37 amDEN-STL
2h 11mnonstop
3:53 pm - 5:17 pmSTL-DEN
2h 24mnonstop
$58Frontier
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Fri, Aug 16 - Sun, Aug 18
6:26 am - 9:37 amDEN-STL
2h 11mnonstop
8:00 pm - 9:28 pmSTL-DEN
2h 28mnonstop
$67Frontier
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Fri, Aug 23 - Wed, Aug 28
6:15 am - 9:25 amDEN-STL
2h 10mnonstop
8:02 pm - 9:25 pmSTL-DEN
2h 23mnonstop
$72Frontier
Find Deal
Fri, Aug 9 - Sat, Aug 10
6:15 am - 9:25 amDEN-STL
2h 10mnonstop
8:02 pm - 9:25 pmSTL-DEN
2h 23mnonstop
$73Frontier
Find Deal
Mon, Aug 5 - Wed, Aug 7
6:20 am - 9:29 amDEN-STL
2h 09mnonstop
8:02 pm - 9:32 pmSTL-DEN
2h 30mnonstop
$77Frontier
Find Deal
Wed, Jun 26 - Sat, Jun 29
6:15 am - 9:25 amDEN-STL
2h 10mnonstop
5:19 pm - 6:37 pmSTL-DEN
2h 18mnonstop
$78Frontier
Find Deal
Wed, Jul 31 - Fri, Aug 2
1:25 pm - 4:29 pmDEN-STL
2h 04mnonstop
4:45 pm - 6:12 pmSTL-DEN
2h 27mnonstop
$612United Airlines
Find Deal
Thu, Jun 20 - Mon, Jun 24
7:20 pm - 12:55 pmDenver Bus-
St. Louis Gateway Station
16h 35mnonstop
5:50 pm - 10:00 amSt. Louis Gateway Station-
Denver Bus
17h 10mnonstop
$267Greyhound
Find Deal
Tue, Jun 11 - Wed, Jun 12

Flights from Denver to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Denver to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Denver to St. Louis?

The average price of all flights from Denver to St. Louis clicked on KAYAK for each day over the last 12 months.
For Denver to St. Louis, Wednesday is the cheapest day to fly on average and Monday is the most expensive. Flying from St. Louis back to Denver, the best deals are generally found on Tuesday, with Sunday being the most expensive.

What is the cheapest month to fly from Denver to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Denver to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Denver to St. Louis is September, where tickets cost $128 on average. On the other hand, the most expensive months are December and February, where the average cost of tickets is $201 and $176 respectively.

How far in advance should I book a flight from Denver to St. Louis?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Denver to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Denver to St. Louis, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 48 days before departure.

Which airlines provide the cheapest flights from Denver to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to St. Louis from Denver were found on Frontier ($39) and Delta ($88), and the lowest round-trip tickets were found on Frontier ($47) and United Airlines ($142).

Which airlines fly most frequently between Denver and St. Louis?

Southwest (10 flights per day), United Airlines (4 flights per day), and Frontier (one flight per day) are the most frequent flyers of this route.

Which airlines fly non-stop between Denver and St. Louis?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Denver to St. Louis.
There are 3 airlines that fly nonstop from Denver to St. Louis. They are: Frontier, Southwest and United Airlines. The cheapest price of all airlines flying this route was found with Frontier at $48 for a one-way flight. On average, the best prices for this route can be found at Frontier.

How many flights are there between Denver and St. Louis per day?

Each day, there are between 10 and 20 nonstop flights that take off from Denver and land in St. Louis, with an average flight time of 2h 01m. The most common departure time is 9:00 am and most flights take off in the morning. Each week, there are 105 flights. The most frequent day of departure is Friday, when 19% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Denver and St. Louis?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Denver to St. Louis take?

A direct flight to St. Louis will take on average 2h 04m to travel the 767 miles flying distance from Denver.

What’s the earliest departure time from Denver to St. Louis?

Early birds can take the earliest flight from Denver at 5:30 am and will be landing in St. Louis at 8:30 am.

What’s the latest departure time from Denver to St. Louis?

If you prefer to fly at night, the latest flight from Denver to St. Louis jets off at 10:15 pm and lands at 1:15 am.

Good to know

Low season

January

High season

May

Cheapest flight

$39
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from Denver to St. Louis

When to book flights from Denver to St. Louis

Are your dates flexible? Find out the best times to travel from Denver to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to St. Louis

  • Can I fly nonstop from Denver International Airport (DEN) to Lambert St Louis Airport (STL)?

    Yes, direct flights exist between Denver International Airport and Lambert St. Louis Airport. Multiple carriers, like Southwest Airlines and United Airlines, provide direct flights from DEN to Lambert Airport if you want to reach your destination quickly.

  • Is there public transportation to downtown from Lambert St Louis Airport?

    Yes, there is public transportation from Lambert St Louis to downtown. There are multiple options such as train, bus, or even taxi. Services run daily and leave every 20min. The travel time is roughly 30min.

  • Are there hotels at Lambert St Louis?

    Yes, there are quite a few hotel alternatives at and in close proximity to Lambert International Airport in St. Louis, including Hampton Inn St. Louis Airport and the Comfort Inn & Suites St. Louis-Hazelwood.

  • How can I get from one terminal to the other?

    STL Airport has a free 24h Terminal Shuttle that operates between Exit 12 at both terminals. There is currently no way to walk between terminals. Terminal 1 and Terminal 2 are less than one mile apart, thus the shuttle trip duration is roughly 10min. Every 8 to 15min, shuttles are scheduled to pick up passengers.

  • What is the cheapest flight from Denver to St. Louis?

    In the last 3 days, the lowest price for a flight from Denver to St. Louis was $39 for a one-way ticket and $47 for a round-trip.

  • Do I need a passport to fly between Denver and St. Louis?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines offer Wi-Fi service onboard planes from Denver to St. Louis?

    American Airlines, and Delta offer inflight Wi-Fi service on the Denver to St. Louis flight route.

  • Which aircraft models fly most regularly from Denver to St. Louis?

    The Airbus A319 is the aircraft model that flies most regularly on the Denver to St. Louis flight route.

  • Which airline alliances offer flights from Denver to St. Louis?

    Star Alliance is the only airline alliance operating flights between Denver and St. Louis.

  • On which days can I fly direct from Denver to St. Louis?

    There are nonstop flights from Denver to St. Louis on a daily basis.

  • Which is the best airline for flights from Denver to St. Louis, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to St. Louis are United Airlines and American Airlines. With an average price for the route of $298 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $326 and an overall rating of 7.3.

  • How does KAYAK find such low prices on flights from Denver to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Denver with another airline. Booking your flights between Denver and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Denver to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $79 or less one-way and $114 or less round-trip.
  • Utilize the offered lounges at the departure and arrival airports. There are about six lounges at Denver International Airport (DEN) and a number of lounges at Lambert St. Louis (STL) that provide free food, drinks, showers, and high-speed Wi-Fi, among other services.
  • If you are departing from Denver International Airport (DEN) and need parking, there are numerous alternatives. You may use Valet Parking, which offers the best prices and reservations or choose one of the indoor or outdoor self-parking choices. They offer a range of amenities, including 24h staff and shuttles, wider, angled parking, free EV charging, and free roses.
  • When flying out of Denver International Airport, it is suggested that you arrive at the airport 2h before your flight's scheduled departure time. This should provide you with plenty of time to check-in for your flight, go through security, and make your way to your gate. If you visit the DEN website before you leave, you will be able to observe the wait times for the security lines in real-time, which will allow you to better prepare for your trip. Every single security checkpoint inside the DEN is always open and performing appropriately.
  • Free assistance for passengers traveling with wheelchairs is offered by airlines at both Denver International Airport (DEN) and Lambert St. Louis Airport (STL). Travelers with limited mobility or elderly passengers may find this to be of great assistance. Contacting the airline in advance to request a passenger help agent will get you the finest possible accommodations.
  • If you need to convert money at Lambert St Louis, go to the lower level of Terminal 1 and find the currency exchange counter near the C Gates security checkpoint. US Bank has a branch at the airport that provides comprehensive banking services as well as a currency exchange for international travelers. The business is open from Monday through Friday, starting at 8 am and closing at 5 pm.
See more tips

Prefer to fly non-stop from Denver to St. Louis?

Find which airlines fly direct from Denver Intl to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Denver Intl to Lambert-St Louis

Monday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Tuesday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Wednesday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Thursday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Friday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Saturday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Sunday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

See more direct flights

Nonstop returns

Lambert-St Louis to Denver Intl

Monday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Tuesday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Wednesday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Thursday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Friday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Saturday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

Sunday

Air Canada, Frontier, Southwest, +1 more

Air Canada, Frontier, +2 more

See more direct flights
See more direct flights

Top 3 airlines serving from Denver to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Denver to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10696 reviews
8.1Crew
6.7Food
7.2Comfort
7.1Entertainment
7.7Boarding
Airline reviews

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

8.0 ExcellentKeith, May 2024DEN - FAT
Read more about United Airlines reviews

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

Flight delayed from Cape Town to Washington then got diverted to miami and in miami we had to fend for ourselves , im still trying to get to Shreveport now

I just wrote a text which was supposed to be for the flight from Denver to spokane not Frankfurt to Denver.

Too many fees (but that seems to apply to all airlines nowadays)

Flight was on time. Staff were friendly. I paid for Economy Plus but was required to check my standard carry-on luggage due to lack of space on the aircraft. This cost me 30 minutes, unexpectedly, in waiting at the baggage claim. This experience did not meet my expectations.

Everything was very good. Boarding and takeoff were on time and organized. Had a good flight

Wheelchair assistance was not complete. The person left me at the departure gate without informing the groundstaff of my requirements. I had to walk to the departure counter to ask for help to reach the plane door. The crew informed me that in future they were not allowed to help passengers like me, senior citizen and Wheelchair passenger with placing their carry on bags in the overhead compartments!

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

Seats are way too snug for my hip to knee ratio and the recline on the seat in front of me made my experience worst. My legs had no room at all. Not a plane for people 6 ft or over unless you fly first class.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Terrible. I didn’t fly and I had an important meeting the next day.

Equipment swap led to 2+ hour delay on international flight. And to top it off, boarding took forever.

Wretched scheduling - they got themselves into a critical crew situation and didn’t try to address it until 15 minutes before they had to cancel my flight

They cancelled two flight and got us onto another airline, which was also delayed.

Nothing, terrible travel experience due to weather and maintenance delays and was left stranded in Austin.

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

28 hour delay at Fort Worth/Dallas airport, part due to weather which was unavoidable, but various other reasons - no pilot, no fa, mechanical problem, plane too small, too big, crew out of flying time, seat configuration problems.... endless and hourly updates with a different excuse. Finally told us about 3.00 am, that the flight was delayed to hours later.

Experience was bad. 3.5 hour delay for a 2.5 hour trip. There was no r Transparency about the reason for the delay and it was done 30 mins at a time.

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

Didn't like anything..entire crew was very rude to everyone on the flight. Plane old and the trays fall down on you the while time you're flying. Charged more for a carry on bag than for the plane ticket itself. Did make it from point a to point b, but worth the extra money to fly with another airline

My experience with frontier staff at the Denver airport was absolutely horrible. The manager on duty was even worst if was the worst experience I have ever had, I have never been treated so poorly as a customer in my life! The staff was extremely rude, eye rolls and attitude and then refusal to help me at all. I wish I could never fly frontier again that’s how horrible it was!

Fecal matter in seat back pocket. Presumably from a kids diaper.

I didn't get to do this flight l, hard to review

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Left Denver late, then sat on tarmac 30 min after arrival

Everything was good, 20/30 minutes late waiting on a crew member. It’s hard to keep employees. Or serious employees I know. I remember one flight from Houston of Frontiers was almost 18 hours late. And another 4 hours late very poor. But I would rather be late and safe than the on the news. Thank you.

Bought seats on the flight and they were supposed to be 2 and a jumpseat. Plane clearly changed and it was a regular 3 seat row. Asked for a refund and was denied. If I wanted to sit next to someone else I wouldn't have bought the seats..

Lost baggage on my connecting flight. 24 hours later, still no update on my bags.

It’s a cheap airline and I wish if they had better seats.

Book cheap flights from Denver to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Denver to St. Louis found on KAYAK in the last 72 hours.
7/3Wed
nonstopFrontier
2h 09mDEN-STL
$39
9/5Thu
nonstopFrontier
2h 07mDEN-STL
$44
9/4Wed
1 stopDelta
5h 24mDEN-STL
$88
9/5Thu
1 stopDelta
5h 19mDEN-STL
$98
9/6Fri
1 stopAmerican Airlines
4h 54mDEN-STL
$99
7/4Thu
1 stopSun Country Air
14h 39mDEN-STL
$101
7/6Sat
1 stopUnited Airlines
5h 51mDEN-STL
$124
6/27Thu
1 stopSun Country Air
26h 15mDEN-STL
$138
6/16Sun
1 stopUnited Airlines
7h 06mDEN-STL
$178
7/5Fri
2 stopsAmerican Airlines
13h 59mDEN-STL
$251

Search by stops

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Last minute flights from Denver to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Denver to St. Louis that are departing in the next 10 days.
6/10Mon
multi-stopFrontier
14h 59mDEN-STL
6/12Wed
nonstopFrontier
2h 30mSTL-DEN
$126
6/7Fri
multi-stopFrontier
13h 19mDEN-STL
6/12Wed
nonstopFrontier
2h 30mSTL-DEN
$128
6/9Sun
multi-stop
6h 00mDEN-STL
6/12Wed
nonstop
2h 30mSTL-DEN
$192
6/9Sun
multi-stop
6h 00mDEN-STL
6/12Wed
nonstop
2h 30mSTL-DEN
$232
6/11Tue
multi-stopDelta
7h 35mDEN-STL
6/19Wed
multi-stopDelta
7h 51mSTL-DEN
$449
6/10Mon
nonstopUnited Airlines
2h 04mDEN-STL
6/13Thu
nonstopUnited Airlines
2h 24mSTL-DEN
$552
6/7Fri
multi-stopDelta
7h 15mDEN-STL
6/15Sat
multi-stopDelta
6h 28mSTL-DEN
$586
6/8Sat
multi-stopUnited Airlines
9h 39mDEN-STL
6/15Sat
multi-stopUnited Airlines
5h 23mSTL-DEN
$605
6/11Tue
multi-stopAlaska Airlines
28h 43mDEN-STL
6/15Sat
multi-stopAlaska Airlines
16h 30mSTL-DEN
$803
6/8Sat
multi-stopAlaska Airlines
26h 46mDEN-STL
6/12Wed
multi-stopAlaska Airlines
21h 26mSTL-DEN
$806

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Denver - St. Louis Flights

Departure:

Denver (DEN)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Denver

Cabin classes:

$674
$392
$470
$48

Compare transportation modes for Denver to St. Louis

Average priceAverage duration
Flights$2002h 06m
Buses$26716h 35m