$395 Find Cheap Flights from Europe to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 8/28. 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
1 adult, Economy

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Cheap Flights from Europe to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Europe to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Europe to Ontario

Wed, Sep 3 - Thu, Oct 9
United Airlines Logo
12:10 pm - 10:30 pmBCN-ONT
19h 20m2 stops
United Airlines Logo
5:05 am - 7:50 amONT-BCN
17h 45m2 stops
$457United Airlines
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Thu, Nov 27 - Tue, Dec 2
United Airlines Logo
6:50 am - 5:34 pmBCN-ONT
19h 44m2 stops
United Airlines Logo
7:00 am - 9:00 amONT-BCN
17h 00m2 stops
$459United Airlines
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Wed, Nov 5 - Wed, Nov 12
British Airways Logo
12:40 pm - 11:45 pmMAD-ONT
20h 05m2 stops
British Airways Logo
11:00 am - 1:25 pmONT-MAD
17h 25m2 stops
$465British Airways
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Thu, Oct 30 - Tue, Nov 11
British Airways Logo
11:10 am - 12:02 amBCN-ONT
20h 52m2 stops
British Airways Logo
5:01 pm - 6:25 pmONT-BCN
16h 24m2 stops
$465British Airways
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Thu, Oct 16 - Sun, Oct 19
Air Canada Logo
12:30 pm - 5:23 pmMAD-ONT
37h 53m2 stops
Air Canada Logo
6:37 pm - 6:40 amONT-MAD
27h 03m2 stops
$466Air Canada
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Thu, Oct 30 - Tue, Nov 11
 Logo
5:50 am - 5:34 pmBCN-ONT
19h 44m2 stops
 Logo
7:00 am - 1:05 pmONT-BCN
21h 05m1 stop
Thu, Sep 11 - Tue, Sep 16
 Logo
12:30 pm - 10:30 pmMAD-ONT
19h 00m2 stops
 Logo
5:10 am - 6:40 amONT-MAD
16h 30m2 stops
Fri, Sep 5 - Tue, Sep 9
Air Canada Logo
12:45 pm - 8:43 pmMAD-ONT
16h 58m2 stops
Air Canada Logo
5:10 am - 6:40 amONT-MAD
16h 30m2 stops
$489Air Canada
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Thu, Oct 30 - Wed, Nov 12
KLM Logo
9:20 am - 7:42 pmLHR-ONT
17h 22m1 stop
KLM Logo
12:00 pm - 10:35 amONT-LHR
14h 35m1 stop
$550KLM
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Wed, Nov 5 - Tue, Nov 11
KLM Logo
10:45 am - 4:14 pmLHR-ONT
13h 29m1 stop
KLM Logo
12:00 pm - 10:35 amONT-LHR
14h 35m1 stop
$552KLM
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Good to know

Low seasonFebruary
High seasonSeptember
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 21% lower on average.

FAQs for booking flights from Europe to Ontario

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

    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 Europe to Ontario.

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

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

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

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

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

Reviews of the top 3 airlines serving from Europe to Ontario

 
Need help choosing which airline to fly with from Europe to Ontario? 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.
7.8
KLMOverall score based on 1364 reviews
7.8Boarding
7.1Entertainment
7.2Food
7.7Comfort
8.4Crew
Airline reviews

Klm start boarding while somw air issue in the plan

8.0 ExcellentA, Jun 2025AMS - YYZ
Read more KLM reviews

Klm start boarding while somw air issue in the plan

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Its good expeince but in enternteiment please be like you tube the music i like or movie

I needed to make changes to my flights. When I called customer service, they assisted me with care professionalism.

A bit rush for transit. Food and entertainment are not available

Wonderful and fast TSA checkpoint. The line was fast and our gate was close by

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

Our luggage didn’t arrive with us, that puts a damper on the whole trip.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Was 3 hrs delayed and my poor friend I met in Barcelona was waiting at airport for 3 hrs. Dallas airport was awful

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

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