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Find cheap flights from Ontario to Europe from $401

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 11/13. 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
Tue 7/2
Tue 7/9

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Best Europe Flight Deals

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

London
London1 stop$545
Paris
Paris1 stop$804
Madrid
Madrid2 stops$433
Athens
Athens2 stops$516
Lisbon
Lisbon2 stops$922
Dublin
Dublin2 stops$736
Amsterdam
Amsterdam1 stop$1,004
Zurich
Zurich1 stop$1,320
Munich
Munich2 stops$861
Copenhagen
Copenhagen2 stops$548
Edinburgh
Edinburgh2 stops$583
Vienna
Vienna2 stops$1,361

Good to know

Low season

January

High season

June

Cheapest flight

$401
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 London Heathrow Airport

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 2% more expensive 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 10410 reviews
7.9Comfort
7.4Food
8.6Crew
8.2Boarding
8.0Entertainment
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).

I had a great flight. Everything went smoothly and the flight arrived early.

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.

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.

My flight was cancelled after a 7 hour delay. I am awaiting a refund.

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.

Boarding was as fast and efficient as possible. The flight crew were amazing and extremely friendly. We enjoyed our flight.

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

Book cheap flights from Ontario to Europe

Recent round-trip flight deals

10/26Sat
2 stops
29h 35mONT-MAD
11/15Fri
2 stops
41h 10mMAD-ONT
$433
10/27Sun
2 stops
18h 10mONT-MAD
11/15Fri
3 stops
33h 23mMAD-ONT
$439
10/28Mon
2 stopsAmerican Airlines
19h 19mONT-MAD
11/15Fri
1 stopAmerican Airlines
26h 55mMAD-ONT
$453
10/30Wed
2 stopsUnited Airlines
19h 15mONT-MAD
11/12Tue
2 stopsUnited Airlines
24h 37mMAD-ONT
$473
11/18Mon
2 stopsBritish Airways
18h 19mONT-MAD
12/6Fri
1 stopBritish Airways
17h 13mMAD-ONT
$481
11/27Wed
2 stopsUnited Airlines
18h 13mONT-MAD
12/8Sun
2 stopsUnited Airlines
41h 02mMAD-ONT
$487
11/5Tue
2 stopsBritish Airways
19h 56mONT-BCN
11/26Tue
2 stopsBritish Airways
22h 43mBCN-ONT
$503
11/5Tue
1 stopAmerican Airlines
15h 46mONT-LHR
11/21Thu
1 stopAmerican Airlines
16h 23mLHR-ONT
$561
8/13Tue
1 stopDelta
17h 55mONT-ATH
8/21Wed
2 stopsDelta
27h 12mATH-ONT
$590
11/5Tue
2 stopsDelta
15h 48mONT-LHR
11/26Tue
2 stopsDelta
19h 21mLHR-ONT
$607

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Recent one-way flight deals

11/13Wed
1 stopIberia
15h 46mONT-LHR
$401
9/18Wed
2 stops
39h 20mONT-AMS
$407
10/2Wed
1 stopAmerican Airlines
14h 01mONT-LHR
$408
9/1Sun
1 stopUnited Airlines
22h 30mONT-LHR
$413
8/25Sun
1 stopUnited Airlines
15h 36mONT-LHR
$414
7/7Sun
1 stopAmerican Airlines
15h 50mONT-LHR
$431
7/16Tue
1 stopBritish Airways
13h 12mONT-LHR
$442
7/17Wed
2 stopsBritish Airways
15h 57mONT-LHR
$458
11/5Tue
1 stopDelta
16h 15mONT-FCO
$614
6/8Sat
1 stopDelta
26h 40mONT-ATH
$772

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Last minute flights from Ontario to Europe

Last minute flight, train and bus deals

6/3Mon
multi-stop
19h 25mONT-BCN
6/12Wed
multi-stop
38h 03mBCN-ONT
$688
6/3Mon
multi-stop
30h 15mONT-BCN
6/11Tue
multi-stop
38h 03mBCN-ONT
$689
6/4Tue
multi-stopUnited Airlines
15h 05mONT-BCN
6/11Tue
multi-stopUnited Airlines
15h 27mBCN-ONT
$705
6/4Tue
multi-stopUnited Airlines
18h 05mONT-BCN
7/2Tue
multi-stopUnited Airlines
34h 18mBCN-ONT
$709
6/5Wed
multi-stopAmerican Airlines
19h 05mONT-ATH
6/12Wed
multi-stopAmerican Airlines
20h 29mATH-ONT
$1,118
6/6Thu
multi-stopBritish Airways
17h 35mONT-DUB
6/13Thu
multi-stopBritish Airways
20h 49mDUB-ONT
$1,170
6/5Wed
multi-stopBritish Airways
27h 01mONT-BCN
6/8Sat
multi-stopBritish Airways
25h 14mBCN-ONT
$1,190
6/7Fri
multi-stopAmerican Airlines
25h 06mONT-ATH
6/14Fri
multi-stopAmerican Airlines
37h 09mATH-ONT
$1,237
6/3Mon
multi-stopDelta
18h 10mONT-BCN
6/11Tue
multi-stopDelta
17h 17mBCN-ONT
$3,610
6/4Tue
multi-stopDelta
15h 10mONT-CDG
6/18Tue
multi-stopDelta
14h 26mCDG-ONT
$3,624

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Ontario - Europe Flights