$322 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 10/1. 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

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Best Europe Flight Deals from Ontario

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$610
Paris
Paris1 stop$726
Madrid
Madrid2 stops$487
Athens
Athens1 stop$555
Lisbon
Lisbon2 stops$569
Dublin
Dublin2 stops$459
Amsterdam
Amsterdam1 stop$662
Zurich
Zurich1 stop$553
Munich
Munich2 stops$616
Copenhagen
Copenhagen2 stops$604
Edinburgh
Edinburgh2 stops$658
Vienna
Vienna2 stops$543
London
London1 stop$610
Paris
Paris1 stop$726
Madrid
Madrid2 stops$487
Athens
Athens1 stop$555
Lisbon
Lisbon2 stops$569
Dublin
Dublin2 stops$459
Amsterdam
Amsterdam1 stop$662
Zurich
Zurich1 stop$553
Munich
Munich2 stops$616
Copenhagen
Copenhagen2 stops$604
Edinburgh
Edinburgh2 stops$658
Vienna
Vienna2 stops$543

Cheap Flights from Ontario to Europe

 
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

Wed, Nov 12 - Wed, Nov 19
KLM Logo
7:00 am - 10:30 amONT-FCO
18h 30m1 stop
KLM Logo
10:15 am - 7:42 pmFCO-ONT
18h 27m1 stop
$447KLM
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Wed, Nov 12 - Wed, Nov 26
KLM Logo
7:00 am - 10:30 amONT-FCO
18h 30m1 stop
KLM Logo
10:15 am - 7:42 pmFCO-ONT
18h 27m1 stop
$448KLM
Find Deal
Tue, Dec 2 - Wed, Dec 10
United Airlines Logo
7:00 am - 10:05 amONT-DUB
19h 05m2 stops
United Airlines Logo
9:00 am - 10:26 pmDUB-ONT
45h 26m2 stops
$459United Airlines
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Sun, Oct 5 - Tue, Oct 14
United Airlines Logo
1:53 pm - 2:00 pmONT-BCN
15h 07m1 stop
United Airlines Logo
3:15 pm - 10:30 pmBCN-ONT
16h 15m1 stop
$483United Airlines
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Sat, Nov 8 - Wed, Nov 19
British Airways Logo
11:59 pm - 5:45 pmONT-FCO
32h 46m2 stops
British Airways Logo
7:50 am - 9:41 pmFCO-ONT
22h 51m2 stops
$493British Airways
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Wed, Oct 29 - Fri, Nov 7
British Airways Logo
3:00 pm - 7:25 pmONT-FCO
20h 25m2 stops
British Airways Logo
8:10 am - 11:45 pmFCO-ONT
24h 35m2 stops
$500British Airways
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Mon, Aug 4 - Wed, Aug 20
Delta Logo
10:05 pm - 7:50 amONT-MAD
24h 45m2 stops
Delta Logo
10:05 am - 10:20 pmMAD-ONT
21h 15m1 stop
$526Delta
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Tue, Dec 9 - Thu, Jan 8
Delta Logo
7:00 am - 10:30 amONT-FCO
18h 30m1 stop
Delta Logo
6:00 am - 10:38 pmFCO-ONT
25h 38m2 stops
$531Delta
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Tue, Aug 12 - Thu, Aug 21
American Airlines Logo
11:29 pm - 7:20 amONT-FRA
22h 51m1 stop
American Airlines Logo
10:55 am - 6:25 pmFRA-ONT
16h 30m1 stop
$604American Airlines
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Tue, Aug 12 - Thu, Aug 21
American Airlines Logo
6:10 am - 7:20 amONT-FRA
16h 10m2 stops
American Airlines Logo
10:55 am - 12:08 amFRA-ONT
22h 13m1 stop
$608American Airlines
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Useful Info

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 $667 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $1,072 and $1,068 respectively.

What’s the cheapest day of the week to fly from Ontario to Europe?

The average price of all round-trip flights from Ontario to Europe clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Europe on a Wednesday and more expensive on a Saturday. On your return trip to Ontario, you should consider flying back on a Tuesday, and avoid Mondays for better deals.

How far in advance should I book a flight from Ontario to Europe?

To calculate weekly average prices, KAYAK takes all prices for each week before departure 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 average of all the values for each week.

To get a below average price on the flight from Ontario to Europe, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.


Good to know

Low seasonJanuary
High seasonOctober
Cheapest flight$322
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly and prices are also 11% lower on average.
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.

  • What is the cheapest time of day to fly to Europe?

    The cheapest time of day to fly to Europe is generally at night, when round-trip flights cost $662 on average. Morning departures are around 22% more expensive than evening flights, on average. The most expensive time of day to fly to Europe is generally in the morning, which is peak travel time and where the average cost of a ticket is $871.

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.
8.0
DeltaOverall score based on 7946 reviews
7.9Entertainment
8.2Boarding
7.3Food
8.5Crew
7.9Comfort
Airline reviews

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

10.0 ExcellentIrene, Jun 2025LAX - HNL
Read more Delta reviews

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

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.

Delta flight was on time, seats were comfortable, and crew was nice.

Bathrooms dirty sinks clogged. No one seemed to clean them. Plane very old

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

Eventless. It was a good flight and good crew. Can’t complaint.

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

British Airways staff are very polite and willing to help.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

Worst seats I’ve ever had !!! The seats were very narrow and uncomfortable and misaligned with the seats in front of mine leading to bottom of the seat in front of mine pressing on my legs for 15.5 hours !

This was an overnight flight. There was no meal service in first class, just a simple snack basket was offered along with beverages. There should have been some type of continental breakfast prior to arrival in PHL. As an Executive Platinum American Airlines Advantage member, I received no name recognition from the first class flight attendant. When disembarking at PHL, the flight attendants were more interested in their cell phones than saying "thank you" to the passengers as they disembarked.

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

From boarding, to attention in flight, I couldn’t fault it.

Not having to check carry on bags when plane wasn’t full. (The told us it was)

I was in business class for the 8 hour flight where: 1. The WiFi did not work 2. The entertainment system did not work 3. We were told there were no hot drinks for the entire flight

I had an issue with the name on my ticket vs my passport name. I was very upset that the Iberia ticket clerk had no authorization to help me and I was left to fix it. It took 19 calls of persons promising to accomplish and not doing anything before I reached someone who helped me in 10 minutes. Two of them even hung up on me. I missed my original flight because of this. Terrible customer service.

The flight was delayed twice. When the crew explained about the debris causing flat tires, I was glad they took the time to change all four.

My carry-on bag was taken from me when I boarded. It was checked through to London at no charge. It took a big of shuffling, but I was glad not to need to mind it until baggage claim.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

Flight delayed Service could be better Iberia staff are not really friendly

They cancelled the flight)(they said bad weather but many other flights took off) and made us wait 5 hours in line to figure out what to do. We ended up making a new flight the next day on another airlines...I hope they honor giving us our money back

The seats were way too crowded. Just because I do not have the luxury of a suite, does not mean that I want to fly from Austin to London scrunched between two people and the seat in front of me in my face. Ridiculous. I should have flown with Turkish Airlines...

The payment system was not working so was unable to connect wifi the entire flight

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

Our luggage didn’t arrive with us, that puts a damper on the whole trip.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

Was 3 hrs delayed and my poor friend I met in Barcelona was waiting at airport for 3 hrs. Dallas airport was awful

The internet was horrible. Plus they charged me $25 for service that didn't work which should have been free since I'm Concierge Key. The flight attendant Rick Young was excellent. Greeted me by name and very attentive.

Not good. First time flying AA in years and won’t be doing so again. We departed late and missed our connecting flight to Barcelona. As a result we missed the first two days of a Mediterranean cruise. No reason given for the delay. Got rerouted from JFK to Heathrow and then to Barcelona. Flight to Heathrow was delayed causing us to miss the flight to Barcelona again. Routed then to Palmero where we had to purchase transportation and a 2 night hotel stay to pick up the cruise there. Probably cost us $2k plus.

My flights were great and the crew on them was lovely especially the London to Barcelona flight as Al & AJ were so amazingly nice. I wish they would be my crew always as they have the best customer service. Sadly both flights were delayed the first one from Vegas was because they clearly loaded the cargo wrong the plane was off balance making us 2 hours late. This made me miss my connection and sadly it was challenging rebooking while I was on the flight. I will never use Kayak again as there was no customer service number or live chat and you rebooked me on a flight 2 days later. I had my mom call BA to change it which she did after spending an hour on hold. This should not be so difficult. My second flight was an hour delayed due to not being able to disconnect the bridge from the plane but I did finally make it home.

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