$397 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 5/19. 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

Wed, Apr 8 - Wed, Apr 15
Iberia Logo
11:30 am - 11:46 pm
LHR
-
ONT
20h 16m
2 stops
Iberia Logo
2:08 pm - 12:10 pm
ONT
-
LHR
14h 02m
1 stop
$523Iberia
Tue, Apr 14 - Thu, Apr 23
British Airways Logo
10:05 am - 4:22 pm
LHR
-
ONT
14h 17m
1 stop
British Airways Logo
10:59 am - 8:05 am
ONT
-
LHR
13h 06m
1 stop
$528British Airways
Sat, May 2 - Sat, May 9
United Airlines Logo
1:40 pm - 9:58 pm
LHR
-
ONT
16h 18m
1 stop
United Airlines Logo
7:00 am - 6:55 am
ONT
-
LHR
15h 55m
2 stops
$538United Airlines
Thu, Jul 2 - Thu, Jul 16
Virgin Atlantic Logo
10:55 am - 4:14 pm
LHR
-
ONT
13h 19m
1 stop
Virgin Atlantic Logo
2:00 pm - 3:35 pm
ONT
-
LHR
17h 35m
1 stop
$542Virgin Atlantic
Sat, Apr 11 - Sat, Apr 18
United Airlines Logo
2:50 pm - 8:36 pm
LHR
-
ONT
13h 46m
1 stop
United Airlines Logo
10:49 am - 11:10 am
ONT
-
LHR
16h 21m
1 stop
$545United Airlines
Thu, Apr 9 - Thu, Apr 16
Delta Logo
7:00 am - 5:13 pm
FRA
-
ONT
19h 13m
2 stops
Delta Logo
11:53 am - 5:45 pm
ONT
-
FRA
20h 52m
2 stops
$649Delta
Thu, Apr 9 - Thu, Apr 16
Virgin Atlantic Logo
11:00 am - 11:51 pm
FRA
-
ONT
21h 51m
2 stops
Virgin Atlantic Logo
7:05 am - 8:55 am
ONT
-
FRA
16h 50m
1 stop
$651Virgin Atlantic
Wed, Apr 8 - Wed, Apr 15
Delta Logo
7:00 am - 11:51 pm
FRA
-
ONT
25h 51m
2 stops
Delta Logo
6:00 am - 9:50 am
ONT
-
FRA
18h 50m
2 stops
$652Delta
Wed, Apr 15 - Wed, Apr 22
KLM Logo
2:15 pm - 11:44 pm
FRA
-
ONT
18h 29m
2 stops
KLM Logo
5:05 pm - 6:00 pm
ONT
-
FRA
15h 55m
2 stops
$655KLM
Fri, Mar 13 - Tue, Mar 17
KLM Logo
6:50 am - 5:12 pm
VIE
-
ONT
18h 22m
2 stops
KLM Logo
1:20 pm - 6:20 pm
ONT
-
VIE
21h 00m
2 stops
$711KLM
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$397
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 19% lower on average.
Flight from Madrid 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 airline 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 9345 reviews
7.3Comfort
7.7Boarding
8.1Crew
7.1Entertainment
6.6Food
Airline reviews

Flight attendants had a little attitude. Food tastes no good.

6.0 Goodyun bin, Feb 2026
YYZ - SFO
Read more United Airlines reviews

Flight attendants had a little attitude. Food tastes no good.

Overall we had a good experience during our flight from San Francisco to Houston.

it was a very short flight so my expectations were low.

Good flight. However, when booked flight with United, assumed the layover included by United in San Francisco of 1 hr and 40 minutes was sufficient . Not so and would recommend at least 2 hours or more. Needed to go through US immigration (very long lineups), then pick up bags, take all the way to another terminal, running because we did not have sufficient time. We made the flight because they held the door for us but luggage didn’t follow.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario