$319 Find Cheap Flights from Ontario to Europe

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Europe departing on 10/6. 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

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Cheap Flights from Ontario to Europe

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London2 stops$783
Paris
Paris2 stops$789
Madrid
Madrid1 stop$749
Athens
Athens2 stops$801
Lisbon
Lisbon2 stops$826
Dublin
Dublin1 stop$875
Amsterdam
Amsterdam1 stop$761
Zurich
Zurich2 stops$924
Copenhagen
Copenhagen2 stops$760
Munich
Munich2 stops$978
Edinburgh
Edinburgh2 stops$873
Prague
Prague2 stops$707
London
London2 stops$783
Paris
Paris2 stops$789
Madrid
Madrid1 stop$749
Athens
Athens2 stops$801
Lisbon
Lisbon2 stops$826
Dublin
Dublin1 stop$875
Amsterdam
Amsterdam1 stop$761
Zurich
Zurich2 stops$924
Copenhagen
Copenhagen2 stops$760
Munich
Munich2 stops$978
Edinburgh
Edinburgh2 stops$873
Prague
Prague2 stops$707

Book Cheap Ontario to Europe Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Europe 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 Ontario to Europe

Tue, Nov 17 - Wed, Nov 25
Air Canada Logo
5:00 am - 10:05 am
ONT
-
MXP
20h 05m
2 stops
Air Canada Logo
1:05 pm - 8:20 pm
MXP
-
ONT
40h 15m
3 stops
$700Air Canada
Mon, Nov 16 - Fri, Nov 27
United Airlines Logo
7:00 am - 1:05 pm
ONT
-
MXP
21h 05m
1 stop
United Airlines Logo
3:05 pm - 10:26 pm
MXP
-
ONT
16h 21m
1 stop
$703United Airlines
Wed, Nov 4 - Mon, Nov 16
Delta Logo
7:00 am - 5:55 pm
ONT
-
IST
23h 55m
2 stops
Delta Logo
5:55 pm - 4:12 pm
IST
-
ONT
33h 17m
2 stops
$704Delta
Tue, Jun 30 - Wed, Jul 8
KLM Logo
12:02 pm - 11:10 am
ONT
-
BCN
14h 08m
1 stop
KLM Logo
11:00 am - 6:23 pm
BCN
-
ONT
16h 23m
1 stop
$706KLM
Sun, Nov 8 - Mon, Nov 16
Delta Logo
11:55 am - 5:55 pm
ONT
-
IST
43h 00m
2 stops
Delta Logo
5:55 pm - 4:12 pm
IST
-
ONT
33h 17m
2 stops
$710Delta
Sun, Aug 16 - Thu, Aug 27
British Airways Logo
6:00 am - 12:05 pm
ONT
-
FCO
21h 05m
1 stop
British Airways Logo
1:10 pm - 9:12 pm
FCO
-
ONT
17h 02m
1 stop
$719British Airways
Sun, Aug 16 - Thu, Aug 27
British Airways Logo
11:59 pm - 12:05 pm
ONT
-
FCO
27h 06m
1 stop
British Airways Logo
1:10 pm - 10:58 pm
FCO
-
ONT
18h 48m
1 stop
$720British Airways
Mon, Sep 28 - Fri, Oct 16
Iberia Logo
2:22 pm - 10:10 pm
ONT
-
MAD
22h 48m
2 stops
Iberia Logo
12:20 pm - 6:57 pm
MAD
-
ONT
15h 37m
1 stop
$760Iberia
Wed, Sep 23 - Fri, Oct 2
Iberia Logo
2:22 pm - 2:25 pm
ONT
-
MAD
15h 03m
1 stop
Iberia Logo
3:55 pm - 11:06 pm
MAD
-
ONT
16h 11m
1 stop
$762Iberia
Fri, Aug 21 - Sat, Aug 29
American Airlines Logo
11:59 pm - 8:40 am
ONT
-
AMS
23h 41m
1 stop
American Airlines Logo
10:00 am - 9:12 pm
AMS
-
ONT
20h 12m
2 stops
$881American Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Europe flights

Get data-powered insights and trends into flights from Ontario to Europe to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ontario to Europe?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Europe, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Europe is September, when tickets cost $251 (return) on average. On the other hand, the most expensive months are June and May, when the average cost of round-trip tickets is $575 and $550 respectively.

Good to know

Low seasonJanuary
Cheapest flight$319
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Ontario to London Heathrow Airport

FAQs - booking Europe flights

  • How does KAYAK find such low prices on flights from Ontario to Europe?

    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 Ontario to Europe.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Europe?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to 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 Ontario to Europe?

    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 from Ontario to Europe with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Europe?

    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 from Ontario to Europe up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Ontario to Europe

 
Need help choosing which airline to fly with from Ontario to Europe? 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.
7.9
DeltaOverall score based on 8423 reviews
7.2Food
8.1Boarding
8.5Crew
7.8Comfort
7.8Entertainment
Airline reviews

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

10.0 ExcellentTeresa, Apr 2026
SMF - LAX
Read more Delta reviews

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

Lost of requested seat assignments. Lost my husband's meal choice

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

No screens or meal options. Freezing cold. Dirty seats. Left late.

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

It's a long flight and that is always difficult. I was comfortable and well. The movies available were great and the crew was good.

Premium Economy Good crew, good service, excellent food. Seat back screen just not bright enough.

The crew was very attentive through out the flight. Seats were comfortable, nice flight bag with pillow and blanket. Food was okay, since it was a overnight flight seemed to go by fast.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Boarding gate at LAX was too crowded—two gates next to one another

On time departure and early arrival. Flight attendant very nice.

The business class layout of chairs was weired. You are sitting directly across stranger.,

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Friendly crew is the only nice thing. Seats uncomfortable. Food and snacks horrible. Movies were the same as the first 10 hour flight two weeks before

Couldn’t get boarding passes online, delayed an hour, and smallest amount of space on board I’ve ever encountered for such a long flight.

In general, I've had excellent experiences with Iberia flights and will continue to use them. In this last flight there were two things that didn't go right. I didn't get the kosher meal I had pre-requested when I had checked in on-line. Things worked out OK as we ended up eating the fish and vegetarian choices, which were really good. The other issue was that some movies for me and my wife started fine but after 8-12 minutes the content just switched to something else. The flight attendant reset our entertainment systems, but the problem persisted. We ended up choosing other movies/TV shows that did work fine.

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

The flight was canceled on a Thursday last minute. I lost thousands of dollars in hotels and car rental

Excellent lie flat seat for premium economy! Great staff. Bad food . Not so great entertainment. My bag didn’t make it either.

Really like the idea experience on this airline I will use again

Plane delayed due to weather. Plane boarded, then told to unboard due to a maintenance issue.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

The staff was very nice and helpful. Some of the best crew I have met.

Canceled flight late London to Florence. Help at airport very poor. Treated poorly. Had to sleep in the airport. Lost bags- still do not have them. Horrible. I should be reimbursed!

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

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

Wish the food and overall service was better. They treat Business class passengers same as economy

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Awful it always is unfortunately is the only way to fly direct to london

Everything you need to know for your flight to Europe

Information on your arrival and departure airports