$394 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 5/6. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Useful Info
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

Sat, Sep 5 - Sat, Sep 12
British Airways Logo
1:10 pm - 9:34 am
FCO
-
ONT
29h 24m
1 stop
British Airways Logo
2:22 pm - 12:05 pm
ONT
-
FCO
36h 43m
1 stop
$517British Airways
Fri, Aug 14 - Sun, Aug 30
British Airways Logo
1:10 pm - 10:58 pm
FCO
-
ONT
18h 48m
1 stop
British Airways Logo
12:33 pm - 3:50 pm
ONT
-
FCO
18h 17m
2 stops
$522British Airways
Fri, Aug 21 - Sat, Aug 29
British Airways Logo
1:10 pm - 9:12 pm
FCO
-
ONT
17h 02m
1 stop
British Airways Logo
2:43 pm - 12:05 pm
ONT
-
FCO
36h 22m
1 stop
$523British Airways
Fri, Sep 11 - Mon, Sep 14
American Airlines Logo
1:10 pm - 11:48 am
FCO
-
ONT
31h 38m
2 stops
American Airlines Logo
2:22 pm - 7:20 pm
ONT
-
FCO
19h 58m
2 stops
$540American Airlines
Thu, Sep 10 - Mon, Sep 14
American Airlines Logo
11:05 am - 11:48 am
MXP
-
ONT
33h 43m
2 stops
American Airlines Logo
2:22 pm - 11:35 pm
ONT
-
MXP
24h 13m
2 stops
$591American Airlines
Thu, May 7 - Mon, May 11
United Airlines Logo
9:00 am - 9:58 pm
MXP
-
ONT
21h 58m
2 stops
United Airlines Logo
7:00 am - 1:20 pm
ONT
-
MXP
21h 20m
1 stop
$613United Airlines
Sat, Sep 12 - Wed, Sep 16
United Airlines Logo
11:20 am - 10:58 pm
MXP
-
ONT
20h 38m
2 stops
United Airlines Logo
7:00 am - 1:20 pm
ONT
-
MXP
21h 20m
1 stop
$614United Airlines
Wed, May 20 - Tue, May 26
KLM Logo
10:55 am - 4:17 pm
LHR
-
ONT
13h 22m
1 stop
KLM Logo
1:29 pm - 11:00 am
ONT
-
LHR
13h 31m
1 stop
$642KLM
Wed, Jul 22 - Wed, Jul 29
Virgin Atlantic Logo
10:55 am - 4:35 pm
LHR
-
ONT
13h 40m
1 stop
Virgin Atlantic Logo
11:48 am - 1:15 pm
ONT
-
LHR
17h 27m
1 stop
$644Virgin Atlantic
Thu, Oct 15 - Sat, Oct 24
KLM Logo
12:25 pm - 10:43 pm
DUS
-
ONT
19h 18m
2 stops
KLM Logo
12:00 pm - 6:55 pm
ONT
-
DUS
21h 55m
2 stops
$777KLM
Useful Info

Good to know

Low seasonNovember
Cheapest flight$394
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 9635 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
Airline reviews

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.

8.0 ExcellentSally, Apr 2026
ORD - SNA
Read more United Airlines reviews

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

Meals were poor and service rendered on return flight was mediocre as compared to the flight we took to Germany earlier where the attendants were more attentive, energetic, and mindful of passengers' needs. Thumbs up to crew of UA 58. Thumbs down to UA 59..

Flight left on time, arrived early, pleasant staff provided water, coffee, etc. access to bathrooms was reasonable and were well maintained. blankets were available, lots of entertainment options. LUGGAGE SERVICE WAS GREAT. I got my one checked bag quickly and was able to make a bus connection for a 2 hour bus ride saving me from waiting another 1.5 hours.

Terrible, if possible won't be flying again anytime soon!

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

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

The crew has always been great on BA. They are very friendly and accommodating. I like that they have vegetarian options already in the menu. And the free wine is a nice perk.) I noticed (both directions of my trip) minor upgrades/ replacements needed on the plane itself (touch screen didn't work with touch; bathroom light didn't go on). However, this is one of my favorite airlines.

Charging for the internet in business is penny wise pound foolish. WIn €20 lose customer goodwill

Everything was spectacular except the boarding. It was just a mob of people while all groups were called over the public address system.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario