$316 Find Cheap Flights from Ontario to Europe - 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 from Ontario to Europe departing on 8/4. 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.
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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
London1 stop$814
Paris
Paris1 stop$741
Madrid
Madrid2 stops$714
Athens
Athens1 stop$781
Lisbon
Lisbon2 stops$755
Dublin
Dublin1 stop$679
Amsterdam
Amsterdam1 stop$822
Zurich
Zurich1 stop$748
Copenhagen
Copenhagen2 stops$751
Munich
Munich1 stop$795
Edinburgh
Edinburgh2 stops$838
Prague
Prague2 stops$727
London
London1 stop$814
Paris
Paris1 stop$741
Madrid
Madrid2 stops$714
Athens
Athens1 stop$781
Lisbon
Lisbon2 stops$755
Dublin
Dublin1 stop$679
Amsterdam
Amsterdam1 stop$822
Zurich
Zurich1 stop$748
Copenhagen
Copenhagen2 stops$751
Munich
Munich1 stop$795
Edinburgh
Edinburgh2 stops$838
Prague
Prague2 stops$727

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

Thu, Oct 8 - Wed, Oct 21
United Airlines Logo
11:10 am - 8:00 am
ONT
-
BCN
35h 50m
2 stops
United Airlines Logo
4:10 pm - 12:18 pm
BCN
-
ONT
29h 08m
1 stop
$710United Airlines
Tue, Sep 22 - Tue, Oct 6
United Airlines Logo
6:00 am - 8:20 am
ONT
-
BCN
17h 20m
2 stops
United Airlines Logo
11:15 am - 10:49 pm
BCN
-
ONT
20h 34m
2 stops
$711United Airlines
Wed, Aug 19 - Tue, Nov 10
United Airlines Logo
7:00 am - 1:15 pm
ONT
-
BCN
21h 15m
1 stop
United Airlines Logo
3:10 pm - 6:29 pm
BCN
-
ONT
36h 19m
1 stop
$712United Airlines
Mon, Oct 26 - Wed, Nov 4
Delta Logo
12:18 pm - 11:20 am
ONT
-
FCO
15h 02m
1 stop
Delta Logo
12:45 pm - 4:24 pm
FCO
-
ONT
36h 39m
2 stops
$746Delta
Mon, Oct 26 - Fri, Nov 13
KLM Logo
7:00 am - 11:20 am
ONT
-
FCO
20h 20m
1 stop
KLM Logo
1:30 pm - 10:14 pm
FCO
-
ONT
17h 44m
1 stop
$747KLM
Tue, Oct 27 - Thu, Nov 5
Delta Logo
1:17 pm - 3:00 pm
ONT
-
FCO
17h 43m
2 stops
Delta Logo
6:10 am - 11:46 pm
FCO
-
ONT
26h 36m
2 stops
$750Delta
Sun, Sep 20 - Tue, Oct 6
American Airlines Logo
1:04 pm - 3:50 pm
ONT
-
MAD
17h 46m
2 stops
American Airlines Logo
12:40 pm - 7:54 pm
MAD
-
ONT
16h 14m
1 stop
$759American Airlines
Tue, Nov 3 - Mon, Nov 9
British Airways Logo
6:10 am - 7:15 am
ONT
-
FRA
16h 05m
1 stop
British Airways Logo
10:55 am - 9:11 pm
FRA
-
ONT
19h 16m
1 stop
$802British Airways
Tue, Nov 3 - Tue, Nov 17
American Airlines Logo
7:00 am - 7:15 am
ONT
-
FRA
15h 15m
1 stop
American Airlines Logo
10:15 am - 6:22 pm
FRA
-
ONT
17h 07m
1 stop
$804American Airlines
Sun, Nov 15 - Wed, Dec 16
British Airways Logo
12:46 pm - 10:00 am
ONT
-
LHR
13h 14m
1 stop
British Airways Logo
2:45 pm - 10:19 pm
LHR
-
ONT
15h 34m
1 stop
$814British Airways
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 January, when the average cost of round-trip tickets is $891 and $538 respectively.

Good to know

Low seasonJanuary
Cheapest flight$316
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Ontario to Frankfurt am Main

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.
7.8
KLMOverall score based on 1533 reviews
7.7Comfort
7.3Food
8.4Crew
7.8Boarding
7.2Entertainment
Airline reviews

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

2.0 MediocreNewton, Mar 2026
IAD - AMS
Read more KLM reviews

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Seats were comfortable crew members support was very good but AVML ordered or selected by us needs a lot of improvement.

The IFE was quite old, but it worked fine and the content was good. The cabin crew were excellent and the food was as also very good

It was as good as it could be. Flying is not a pleasant experience these days.

Very good flight. Crew was great. No issues and we even arrived early.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Flight delayed four separate times. I’m now one hour hours late to landing.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

The flight was overbooked and the staff at the gate started calling for volunteers to drop out and offering incentives. That delayed the flight

There was no wifi even after my husband paid for wifi it wasn’t working. The plane looked and felt old.

Update the cabin with tv screens or at least music sources.

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

I was very disappointed with my experience at the United Airlines baggage check. The representative was rude and unhelpful. I was required to remove approximately 1.5 pounds from my two checked bags, even though it was a very small amount over the limit. The interaction was unnecessarily unpleasant, and I expected much better customer service. I hope United will review this incident and provide additional customer service training to its staff.

No extra snacks were available. Meals quality is terrible. Crew was not friendly.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

The boarding process on the departure from LA was rather slow even though I was in Group 1. For first class, I was not expecting to have to pay for Wi-fi but I did and then the wi-fi was spotty. The entree was surprisingly good and so that was a pleasant surprise. However, once I got to Houston, it was terrible. Unfortunately there was bad weather but the constant gate changes for my connecting flight was difficult to manage due to having to navigate back and forth between different terminals.

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

Service was professional and quick. Premium economy seat was comfortable given the class

It was perfect! United Airlines staff was extremely caring, super friendly and professional

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

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

Crew was great! Food sub-bar, tepid & flavorless. No snack options on trans-atlantic flight. Premium Economy seats ok, leg rest wouldn’t stay in place.

Entertainment system did not function. USB ports did not function. Wi-Fi did not function. Terrible trifecta…

Flight was delayed multiple times without giving any particular reason and the only thing that was communicated was that 'Aircraft is getting ready'. I was stuck at SFO airport for 15 hours and finally took Southwest Airlines flight back home to Dallas.

I was not clear if food was offered or not.

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.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

The flight was on time and arrived early. The crew were friendly and helpful.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

VERY disappointed at the agent checking in my luggage. I know that the weight limit is 23 kg, a little over 50 pounds (50.71 pounds). Yet the agent kept repeating "50 pounds". So I said, the limit is 23 kg, and she had the audacity to say 'no, it is 22 kg!" Imagine my surprise. Was she ignorant or was she poorly trained? Not sure. The boarding process was pretty good. The speakers were loud enough so I still could hear them despite inconsiderate passengers continuing to speak while the announcements were going on. During the flight, the teenage girl sitting behind me kept pressing her feet to the back of my chair. I turned around several times, yet she did not get the hint. I did not make a fuss since I sense I had a bad streak that night with AA, so I just did the best I can to lean forward and not let that bother me.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

I was booked in Premium Economy and never given a chance to choose to purchase my own seat. Ended up with a middle seat, which was very difficult for me. The airline then left my bag in London so when I arrived in Instanbul it was not there. They delivered it to me the next day but many valuable items had been stolen. I've been flying with BA for years and this was the first time I had such a bizarre and bad experience with them.

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

Flight delayed due to changing a tire....so complete itinerary had to be changed....resulting in delayed arrival. Despite assertions it would be there checked bag didn't arrive til 24 hours later.

Inflight service could have been better. Overall experience was okay

Everything you need to know for your flight to Europe

Information on your arrival and departure airports