Find flights
Deals
When to book
FAQs & Tips
Airlines

Find cheap flights from Ontario to Europe from $377

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Europe departing on 7/12. 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 6/29
Sat 7/6

Search hundreds of travel sites at once for deals on flights to Europe

In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Best Europe Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

London
London2 stops$556
Paris
Paris1 stop$764
Madrid
Madrid2 stops$454
Athens
Athens2 stops$532
Lisbon
Lisbon2 stops$747
Dublin
Dublin2 stops$462
Amsterdam
Amsterdam1 stop$818
Zurich
Zurich2 stops$740
Munich
Munich2 stops$818
Copenhagen
Copenhagen2 stops$488
Edinburgh
Edinburgh2 stops$584
Vienna
Vienna2 stops$745

Good to know

Low season

January

High season

June

Cheapest flight

$377
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 41% increase in price.
Flight from Ontario to Barcelona

FAQs - booking Europe flights

  • How does KAYAK find such low prices on flights from Ontario to Europe?

    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 Ontario to Europe.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Europe?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Europe from Ontario 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 Ontario to Europe?

    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 Europe with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Europe?

    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 Europe from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Europe

  • Morning departure is around 3% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Ontario to Europe

 
Need help choosing which airline to fly with from Ontario to Europe? 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.
8.0
DeltaOverall score based on 10457 reviews
8.2Boarding
8.0Entertainment
8.6Crew
7.4Food
7.9Comfort
Airline reviews

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

10.0 ExcellentMichael, May 2024SJC - ATL
Read more about Delta reviews

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Honestly, I didn’t expect that I will experience this long time wait during the check in. There was only one person who was taking care of the passengers for the economy class and it took us to wait about one hour to do our check i. As a result we barely get to the airplane as the gate was at the end of the airport. That is totally not professional where one crue is working at the registration desk with economy and 3-4 crues are helping for the business class.

Like most domestic flights in the US, you are basically on your own with this airline when it comes to food, so be sure to purchase meals and drinks ahead of time or expect to arrive starving and dehydrated (like I was).

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

On time take off…US cabins look tired and need of refresh!

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Hated every minute of it. This flight should have only taken 1.5hrs but was delayed over 10hours. Now I am being told I cannot be compensated or refunded my ticket price or extra leg room, which I purchased but did not receive, because the airline is throwing the blame on the 3rd party I purchased tickets through and 3rd party putting the blame on airline. No one wants to help. They received their money and that's all they care about. Im going on 3 days of still trying to get to my final destination, had to cancel car rental, car insurance and hotel. Currently staying in airport until hotels open up. Thank you Lufthansa, Kayak, Underpricer and United for making this trip the worst ever.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

Not sure why JAL partnered with American Airlines because their service is no where near similar. Flight attendants were not friendly and didn’t smile. Food was horrible…

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

The staff was unprofessional and didn’t communicate very well. The boarding process was very disheveled, potentially due to a power outage the previous day but there was no contingency plan to properly get passengers boarded the following day. Once boarded the aircraft stayed on the tarmac for over 45 minutes due to high winds. The communication was sporadic but an announcement was finally made an additional 30 minutes later that the flight was cancelled but we couldn’t get off the plane. Prior to deplaning one of the gate agents came on the plane and made an announcement for everyone to pickup their checked bags and take a card to rebook a new reservation because they didn’t have adequate staff. Flights were missed, passengers went to different airports and there was little to no assistance from AA.

Ability to select seating would be nice. We were family of three and they had us seated back to back and one of us on the other side of the plane??? That is pretty goofy. Especially when tickets were placed two months in advance.

My son and I are 193 cm tall. We had reserved and paid for seats with extra leg room towards the front of the cabin. The day of the flight, we learned that Iberia had changed aircraft. We were assigned regular seats way back in the cabin. When we landed from our first leg we spoke with agents at the gate and we were told that they couldn’t improve our seats because the flight was full.

I am quite satisfied. The flight was on time and landed early. Staff was friendly.

I could change to business before flight and everything was perfect except for entertainment which was none.

Other than a late takeoff (not British Airways fault) and some delays with baggage, it was a terrific flight. The crew in business class was superb and the seat and accommodations clean and modern. Could not have asked for more.

Needed more info on connecting flight. Late flight made very short connection. Lost luggage that we still do not have!

Seats comfortable on economy plus and attendants very helpful. Food was ok. Bathrooms needed servicing.

I paid for premium economy but BA oversold the seats and we ended up being downgraded. Not acceptable given how much we paid for the flight. We were also separated to 2 different areas so not only did we not get the service we paid for, we didn’t even get to sit together. I’m not happy at this treatment by BA because of corporate greed.

Original flight was cancelled - After waiting 2 hours for new take-off times. Then had to stand in line for 3 hours, ending at 2:30 am - to be told, " No hotel rooms anywhere in Dallas". No way for me to get any rest at DFW at that time of night.

Thankful for 2-4-2 economy seating. Food was ok. Free beer & wine in economy was nice. Served hot dinner, mud- flight snack and pre-arrival ham sandwich. Seat with pillow & blanket. Reasonable movie options. Overall, a good experience. IBERIA APP is terrible terrible terrible.... needs to get upgraded to equivalent of TAP Airlines App. No option to bid or request an upgrade. Very disappointing.

Very bed boarding, there was overbooked and make a lot of problems and noises

There was a problem in the luggage because there were not porters

On my way from Chicago to London, I was seated next to a quite heavy passenger. I could barely move. BA should have ensured that overweight customers are placed in comfortable seats and not to penalize also other passengers because BA is not willing to accommodate these passengers and their needs. No respect at all.

The flight as far as timings go was excellent. Unfortunately we ended up sat with someone on a night flight who had been drinking alcohol before boarding and BA staff were happily serving him more alcohol. He was very drunk which made our flight uncomfortable and awkward. My partner had this person lying on him whilst asleep. Alcohol should be served minimally. If there had been an emergency this person would not have been in a fit state to act accordingly.

First time flying with BA and I will do it again. Staff at airport and on board were very nice and helpful

they are improving. The crew from Charlotte to Tampa was outstanding. SMILING and trying to be helpful with the customers.

Wonderful service and very comfy in the bulkhead in Economy Plus! Delicious food.

The BA team at Sky Harbor is deplorable, full of unnecessary attitude and poor communication. It seems like every member of the team was looking at another to solve the problem, instead of taking agency to do so themselves. I saw no less than 6 altercations with the same gate agent where he threatened to revoke the passengers boarding pass for asking a wildly reasonable question, something as simple as where the cue to board was. I’ve complained to BA before but it seems this isn’t an issue for them, which is very disappointing

Boarding poor in London,ok in Chicago. Don’t like Heatrow/terminal5

It was very good. We got a late start by about an hour and a half. However I worked rather have that than crash. It was purely mechanical. They had our tickets ready when we came off the plane in London for the next leg. The only mishap was when we got to Lisbon my husbands luggage made or bit mine didn't. All was not lost because I did finally get it 2 days later. I was really pleased that they c made the effort.

Book cheap flights from Ontario to Europe

Recent round-trip flight deals

11/10Sun
2 stopsUnited Airlines
18h 15mONT-MAD
11/20Wed
2 stopsUnited Airlines
24h 37mMAD-ONT
$454
10/29Tue
2 stopsUnited Airlines
16h 21mONT-DUB
11/7Thu
2 stopsUnited Airlines
20h 52mDUB-ONT
$462
11/5Tue
2 stopsBritish Airways
19h 56mONT-BCN
11/26Tue
2 stopsBritish Airways
18h 52mBCN-ONT
$503
10/8Tue
2 stopsBritish Airways
17h 15mONT-DUB
10/17Thu
1 stopBritish Airways
18h 46mDUB-ONT
$515
10/8Tue
1 stopIberia
17h 04mONT-DUB
10/17Thu
1 stopIberia
18h 46mDUB-ONT
$522
10/31Thu
1 stopIberia
17h 44mONT-MAD
11/7Thu
1 stopIberia
17h 12mMAD-ONT
$529
11/17Sun
1 stopAmerican Airlines
13h 29mONT-MAD
11/24Sun
1 stopAmerican Airlines
16h 13mMAD-ONT
$597
10/18Fri
1 stopAmerican Airlines
20h 44mONT-MAD
11/2Sat
2 stopsAmerican Airlines
20h 37mMAD-ONT
$645
9/24Tue
1 stopDelta
17h 45mONT-DUB
10/1Tue
1 stopDelta
19h 28mDUB-ONT
$753
9/25Wed
2 stopsDelta
17h 30mONT-MAD
10/7Mon
1 stopDelta
20h 28mMAD-ONT
$779

Search by stops

Search by airline

Search by price

Recent one-way flight deals

7/12Fri
2 stops
26h 46mONT-BCN
$377
8/11Sun
2 stops
19h 16mONT-CDG
$387
11/20Wed
2 stopsUnited Airlines
18h 13mONT-MAD
$419
8/27Tue
1 stopAmerican Airlines
19h 25mONT-LHR
$428
8/19Mon
1 stopAmerican Airlines
15h 46mONT-LHR
$429
8/7Wed
1 stopBritish Airways
13h 09mONT-LHR
$432
7/14Sun
1 stopBritish Airways
17h 31mONT-LHR
$433
10/30Wed
2 stopsUnited Airlines
18h 00mONT-DUB
$437
7/4Thu
1 stopDelta
17h 40mONT-DUB
$458
7/3Wed
1 stopDelta
17h 40mONT-DUB
$688

Search by stops

Search by airline

Search by price

Last minute flights from Ontario to Europe

Last minute flight, train and bus deals

6/4Tue
multi-stopUnited Airlines
15h 05mONT-BCN
6/12Wed
multi-stopUnited Airlines
15h 27mBCN-ONT
$745
6/2Sun
multi-stopUnited Airlines
23h 10mONT-BCN
6/9Sun
multi-stopUnited Airlines
15h 27mBCN-ONT
$755
6/2Sun
multi-stopAmerican Airlines
23h 16mONT-BCN
6/12Wed
multi-stopAmerican Airlines
19h 09mBCN-ONT
$906
6/2Sun
multi-stopAmerican Airlines
23h 16mONT-BCN
6/12Wed
multi-stopAmerican Airlines
17h 14mBCN-ONT
$908
6/2Sun
multi-stopDelta
14h 07mONT-CDG
6/15Sat
multi-stopDelta
15h 38mCDG-ONT
$954
5/31Fri
multi-stopDelta
16h 30mONT-BCN
6/7Fri
multi-stopDelta
30h 15mBCN-ONT
$994
6/4Tue
multi-stopIberia
48h 45mONT-FRA
6/11Tue
multi-stopIberia
17h 02mFRA-ONT
$1,213
6/4Tue
multi-stopIberia
48h 45mONT-FRA
6/11Tue
multi-stopIberia
21h 27mFRA-ONT
$1,221
6/4Tue
multi-stopBritish Airways
17h 21mONT-BCN
6/12Wed
multi-stopBritish Airways
17h 14mBCN-ONT
$1,361
6/3Mon
multi-stopBritish Airways
16h 14mONT-FRA
6/11Tue
multi-stopBritish Airways
17h 02mFRA-ONT
$1,446

Search by stops

Search by airline

Search by price

Ontario - Europe Flights