$413 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 9/11. 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

Mon, Sep 14 - Mon, Sep 28
American Airlines Logo
2:20 pm - 9:29 am
MXP
-
ONT
28h 09m
2 stops
American Airlines Logo
10:25 am - 1:45 pm
ONT
-
MXP
18h 20m
2 stops
$591American Airlines
Thu, Sep 17 - Fri, Oct 2
American Airlines Logo
10:25 am - 9:29 am
MXP
-
ONT
32h 04m
2 stops
American Airlines Logo
2:22 pm - 10:55 pm
ONT
-
MXP
23h 33m
2 stops
$593American Airlines
Thu, Aug 20 - Sat, Sep 5
British Airways Logo
9:45 pm - 6:15 pm
MXP
-
ONT
29h 30m
2 stops
British Airways Logo
12:59 pm - 11:35 pm
ONT
-
MXP
25h 36m
2 stops
$605British Airways
Wed, Sep 2 - Sun, Sep 6
British Airways Logo
8:25 am - 10:58 pm
MXP
-
ONT
23h 33m
2 stops
British Airways Logo
12:59 pm - 5:45 pm
ONT
-
MXP
43h 46m
2 stops
$606British Airways
Tue, Jul 14 - Thu, Aug 6
United Airlines Logo
11:20 am - 9:55 pm
MXP
-
ONT
19h 35m
2 stops
United Airlines Logo
6:30 am - 1:20 pm
ONT
-
MXP
21h 50m
1 stop
$610United Airlines
Mon, Aug 24 - Thu, Sep 10
United Airlines Logo
7:00 am - 8:52 pm
VIE
-
ONT
22h 52m
2 stops
United Airlines Logo
7:00 am - 8:15 am
ONT
-
VIE
16h 15m
1 stop
$627United Airlines
Wed, Apr 29 - Sun, May 3
Delta Logo
8:15 am - 4:25 pm
DUS
-
ONT
17h 10m
2 stops
Delta Logo
10:15 pm - 8:40 am
ONT
-
DUS
25h 25m
2 stops
$647Delta
Fri, Oct 9 - Thu, Oct 15
Delta Logo
6:55 am - 4:12 pm
DUS
-
ONT
18h 17m
2 stops
Delta Logo
12:00 pm - 1:50 pm
ONT
-
DUS
16h 50m
2 stops
$654Delta
Tue, May 26 - Tue, Jun 2
KLM Logo
12:25 pm - 10:34 pm
DUS
-
ONT
19h 09m
2 stops
KLM Logo
1:35 pm - 5:40 pm
ONT
-
DUS
19h 05m
2 stops
$664KLM
Thu, Sep 24 - Sat, Oct 17
KLM Logo
6:20 am - 6:01 pm
DUS
-
ONT
20h 41m
2 stops
KLM Logo
12:00 pm - 5:40 pm
ONT
-
DUS
20h 40m
2 stops
$696KLM
Useful Info

Good to know

Low seasonNovember
Cheapest flight$413
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 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 9589 reviews
7.3Comfort
7.7Boarding
6.6Food
8.1Crew
7.1Entertainment
Airline reviews

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

4.0 OkayAnonymous, Apr 2026
HNL - LAX
Read more United Airlines reviews

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.

we did a return flight from Paris CDG to SFO. This trip was much better than the departing flight SFO to CDG. The food was better quality, the crew was nicer, and the interior of the plane seemed cleaner.

Horrible service no Wi-Fi connection on both leg of the flight and they are refusing to fix bad service

We got to get extended leg room in Econ plus that was great. It was nice having our own dietary needs met with our meals, and the connecting flights had it as well. Only negative were the seats my bottom was/is really sore after a ten plus hour flight. Those seats are horrible, understandable for as many people use them. So we are going to purchase a gel seat pad.

Flight to Japan was was better across the board than the return to USA. Entertainment: Movie selection was old and not to my liking. Way too many woke choices. Not enough selections for sports or drama. Service: some of the crew were great. Not all. I paid for business class. a premium. Some of the crew thought they 'had' t do there job instead of wanting to serve and be polite. Food: Way to Japan was good. Way back to USA bad. Boarding: Wat out did not offer Business only; had to go thru general. If you pay for business, you should get business perks. Suggest you look for other than United for travel to Asia

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario