$368 Find Cheap Flights from Europe to Ontario - Compare and Save

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 11/25. 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, Sep 9 - Sun, Sep 20
United Airlines Logo
6:40 am - 6:16 pm
BCN
-
ONT
20h 36m
2 stops
United Airlines Logo
6:08 am - 8:20 am
ONT
-
BCN
17h 12m
2 stops
$544United Airlines
Thu, Sep 10 - Mon, Sep 21
United Airlines Logo
8:20 am - 6:11 pm
MAD
-
ONT
18h 51m
2 stops
United Airlines Logo
7:00 am - 8:05 am
ONT
-
MAD
16h 05m
2 stops
$545United Airlines
Thu, Sep 24 - Mon, Sep 28
British Airways Logo
3:55 pm - 11:36 pm
MAD
-
ONT
16h 41m
1 stop
British Airways Logo
10:25 am - 9:05 am
ONT
-
MAD
13h 40m
1 stop
$560British Airways
Tue, Sep 1 - Sat, Sep 12
Multiple Airlines Logo
12:15 pm - 10:35 pm
BCN
-
ONT
19h 20m
2 stops
Multiple Airlines Logo
7:00 am - 8:00 am
ONT
-
BCN
16h 00m
2 stops
$561Multiple Airlines
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
12:15 pm - 10:59 pm
BCN
-
ONT
19h 44m
2 stops
Multiple Airlines Logo
7:00 am - 8:00 am
ONT
-
BCN
16h 00m
2 stops
$562Multiple Airlines
Thu, Nov 5 - Sun, Nov 8
American Airlines Logo
7:30 am - 11:53 am
FCO
-
ONT
37h 23m
2 stops
American Airlines Logo
10:47 am - 2:30 pm
ONT
-
FCO
18h 43m
2 stops
$570American Airlines
Thu, Nov 5 - Sun, Nov 8
American Airlines Logo
7:30 am - 11:57 pm
FCO
-
ONT
25h 27m
2 stops
American Airlines Logo
7:00 am - 12:25 pm
ONT
-
FCO
20h 25m
2 stops
$571American Airlines
Tue, Nov 3 - Tue, Nov 17
Iberia Logo
10:40 am - 11:57 pm
BCN
-
ONT
22h 17m
1 stop
Iberia Logo
10:47 am - 8:50 am
ONT
-
BCN
13h 03m
1 stop
$582Iberia
Sat, Sep 5 - Sat, Oct 3
British Airways Logo
3:55 pm - 10:59 pm
MAD
-
ONT
16h 04m
1 stop
British Airways Logo
10:25 am - 9:05 am
ONT
-
MAD
13h 40m
1 stop
$586British Airways
Wed, Oct 7 - Sun, Oct 18
Iberia Logo
12:20 pm - 11:52 pm
MAD
-
ONT
20h 32m
1 stop
Iberia Logo
10:25 am - 9:05 am
ONT
-
MAD
13h 40m
1 stop
$605Iberia
Useful Info

Good to know

Low seasonJanuary
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 28% increase in price.

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 9927 reviews
7.7Boarding
8.1Crew
7.3Comfort
6.7Food
7.1Entertainment
Airline reviews

The airline was fine, but I did want to share about Kayak's error through Underpricer. The original booking was purchased with ANA, and Kayak booked it with United. This is a mistake that should not be happening, since the price I paid was with ANA and that was my preference. I appreciate the efforts done to make this right by paying for the seat preference, but sitting in the back of the airplane under economy is not enough to make this error right. ANA Airlines was the experience I wanted considering this was a life time experience that my family and I wanted to have as part of our Japanese experience. Please work on your affiliation with Underpricer to make the right bookings that the customer pays for. In my situation, I could of paid less for a United ticket versus my original payment with ANA Airlines.

8.0 ExcellentGladys, Jul 2026
HND - LAX
Read more United Airlines reviews

The airline was fine, but I did want to share about Kayak's error through Underpricer. The original booking was purchased with ANA, and Kayak booked it with United. This is a mistake that should not be happening, since the price I paid was with ANA and that was my preference. I appreciate the efforts done to make this right by paying for the seat preference, but sitting in the back of the airplane under economy is not enough to make this error right. ANA Airlines was the experience I wanted considering this was a life time experience that my family and I wanted to have as part of our Japanese experience. Please work on your affiliation with Underpricer to make the right bookings that the customer pays for. In my situation, I could of paid less for a United ticket versus my original payment with ANA Airlines.

The Manila airport was under renovation so there was no business class lounge. The double security check was disorganized and the flight attendants were grouchy.

Know that the movies that you are going to be offered are the oldest be rated movies they could possibly get. They may have one or two new movies that they keep advertising but when you’re flying 15 hours, there is nothing to see past the first new movie.

Flight attendants on United are the worst in the business. Can’t be bothered to provide even basic levels of service and are as rude as anyone can get. This flight was not an exception to that rule.

Friendly crew, but we were delayed for more than an hour and had to change planes due to maintenance issues.

United has been holding my money for a cancel on another ticket they wouldn’t let me fly for going on 5 months. Terrible service I wouldn’t choose to buy tickets or fly with united again. Very bad experience generally dishonorable and poor service .

The flight got delayed. They forgot to bring the drinks when I asked for it. The toilet is messy.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario