$409 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 5/20. 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, 0 bags

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Flight Deals

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

sáb., sep. 5 - sáb., sep. 19
Virgin Atlantic Logo
10:55 am - 10:44 pm
LHR
-
ONT
19h 49m
1 stop
Virgin Atlantic Logo
1:00 pm - 10:00 am
ONT
-
LHR
13h 00m
1 stop
$625Virgin Atlantic
mar., jun. 2 - mar., jun. 30
United Airlines Logo
7:00 am - 10:46 pm
VIE
-
ONT
24h 46m
2 stops
United Airlines Logo
4:20 pm - 1:45 pm
ONT
-
VIE
36h 25m
2 stops
$627United Airlines
mié., sep. 9 - mar., sep. 29
British Airways Logo
2:25 pm - 9:08 pm
LHR
-
ONT
14h 43m
1 stop
British Airways Logo
1:31 pm - 10:30 am
ONT
-
LHR
12h 59m
1 stop
$641British Airways
mar., may. 26 - mar., jun. 2
Multiple Airlines Logo
10:55 am - 4:17 pm
LHR
-
ONT
13h 22m
1 stop
Multiple Airlines Logo
1:29 pm - 11:00 am
ONT
-
LHR
13h 31m
1 stop
$642Multiple Airlines
mar., may. 26 - mar., jun. 2
Delta Logo
8:40 am - 10:34 pm
LHR
-
ONT
21h 54m
2 stops
Delta Logo
11:52 am - 12:10 pm
ONT
-
LHR
16h 18m
1 stop
$652Delta
jue., may. 28 - mar., jun. 2
Multiple Airlines Logo
10:55 am - 4:17 pm
LHR
-
ONT
13h 22m
1 stop
Multiple Airlines Logo
1:29 pm - 11:00 am
ONT
-
LHR
13h 31m
1 stop
$655Multiple Airlines
mar., jun. 9 - lun., jun. 22
British Airways Logo
9:20 am - 10:36 pm
FRA
-
ONT
22h 16m
1 stop
British Airways Logo
11:59 pm - 8:45 am
ONT
-
FRA
23h 46m
1 stop
$688British Airways
jue., sep. 17 - lun., sep. 21
American Airlines Logo
6:30 am - 11:06 pm
FRA
-
ONT
25h 36m
2 stops
American Airlines Logo
10:25 am - 10:20 pm
ONT
-
FRA
26h 55m
2 stops
$696American Airlines
sáb., sep. 5 - vie., sep. 25
American Airlines Logo
6:10 am - 9:12 pm
LYS
-
ONT
24h 02m
2 stops
American Airlines Logo
2:22 pm - 6:20 pm
ONT
-
LYS
18h 58m
2 stops
$743American Airlines
sáb., may. 9 - mié., may. 13
Delta Logo
11:45 am - 10:34 pm
CDG
-
ONT
19h 49m
2 stops
Delta Logo
5:50 pm - 7:55 pm
ONT
-
CDG
17h 05m
2 stops
$753Delta
Useful Info

Good to know

Low seasonNovember
Cheapest flight$409
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Barcelona to Ontario

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 airlines flying 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.
7.4
United AirlinesOverall score based on 9677 reviews
7.7Boarding
6.6Food
7.1Entertainment
8.1Crew
7.3Comfort
Airline reviews

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

6.0 GoodAnonymous, Apr 2026
HND - SFO
Read more United Airlines reviews

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

Outstanding service, great food, friendly & efficient crew, safe & comfortable flight

Staff were not attentive, wifi did not work, cut my head in the bathroom due to the position of the soap on the sink, had blood running down my face, told staff, they had no expression no sympathy, didn't even say "sorry", they said "oh we will have a look at that" about 10 mins later the purser brought me a bandaid, still no sorry.... Shocking

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

The flight was delayed from take off because only one runway was operational in San Francisco.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

Dinner was good, but the breakfast served in the morning was horrible.

Packed in plane small uncomfortable seats elbow to elbow nobody wants to be in that situation for the money they paid

Checking in united could not figure out my star alliance gold. Baggage did not get marked priority and didn't receive boarding passes. When got to SFO lounge personal fixed everything Immediately

A shout-out to the flight attendent, Lauren, who was the main person assisting me. She was amazing - perfect balance of bright, cheerful, engaging, yet formal

1st class seats NOT REALLY 1st class or business class but like premier economy. Should be listed as such or named something else. I have flown 1st class with other airlines and they are nothing like it at all.

The flight from Dallas to madrid was delayed for 2 to 3 hours, the flight back from Dallas to Sacramento was fine , but there were 5 gate changes within the span of 2 hours, last one was in a differny terminal. Flight and crew was okay

I was downgraded from business class to economy class with no compensation. American Airlines is absolutely the worst airline for international travel. They treat their business class customers like dogs.

OK, except for a cabin attendant's lack of attention.

efficient. on time. cabin crew were very professional and very nice to deal with. would definately fly BA again.

It was great overall. A few slight improvements could be made on the onboarding process at the Gates with announcements and clarity of communications (both at the gate and in flight). The movies in the entertainment options could be improved for bollywood, hollywood.

I alrady responded to this request, and expllaned at length that this was the worst flying experience in my 77 years. I will NEVER fly BA again.

Airbus A350 is poorly designed for wheelchair users and reduced mobility passengers. The angle of the pods makes it awkward to transfer. I was able to but I have ab stability. It could be a real challenge for people with more severe mobility impairments. You'd think Airbus would have come up with a solution for this or thought more about us disabled folks more when designing this aircraft.

Check-in in SAN was long. ORD was good. Flight delayed On board crew was ok. No warmth or personality. LHrR barely made connection

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario