$225 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 3/24. 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$610
Paris
Paris2 stops$551
Madrid
Madrid2 stops$510
Athens
Athens2 stops$481
Lisbon
Lisbon2 stops$492
Dublin
Dublin2 stops$637
Amsterdam
Amsterdam2 stops$531
Zurich
Zurich1 stop$894
Copenhagen
Copenhagen2 stops$528
Munich
Munich2 stops$967
Edinburgh
Edinburgh2 stops$610
Prague
Prague2 stops$495
London
London2 stops$610
Paris
Paris2 stops$551
Madrid
Madrid2 stops$510
Athens
Athens2 stops$481
Lisbon
Lisbon2 stops$492
Dublin
Dublin2 stops$637
Amsterdam
Amsterdam2 stops$531
Zurich
Zurich1 stop$894
Copenhagen
Copenhagen2 stops$528
Munich
Munich2 stops$967
Edinburgh
Edinburgh2 stops$610
Prague
Prague2 stops$495

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

Wed, Mar 4 - Wed, Mar 18
Multiple Airlines Logo
5:00 am - 9:55 am
ONT
-
MXP
19h 55m2 stops
Multiple Airlines Logo
12:05 pm - 12:48 pm
MXP
-
ONT
32h 43m3 stops
$481Multiple Airlines
Sat, Mar 7 - Sat, Mar 14
United Airlines Logo
6:00 am - 1:40 am
ONT
-
ATH
33h 40m2 stops
United Airlines Logo
12:15 pm - 10:25 pm
ATH
-
ONT
43h 10m2 stops
$481United Airlines
Mon, Feb 16 - Mon, Feb 23
British Airways Logo
5:06 pm - 12:30 pm
ONT
-
ATH
33h 24m2 stops
British Airways Logo
7:45 am - 10:49 pm
ATH
-
ONT
25h 04m2 stops
$491British Airways
Mon, Feb 2 - Mon, Feb 9
British Airways Logo
3:09 pm - 7:50 pm
ONT
-
MXP
19h 41m2 stops
British Airways Logo
11:20 am - 10:48 pm
MXP
-
ONT
20h 28m2 stops
$492British Airways
Tue, Jan 13 - Fri, Jan 23
Iberia Logo
10:58 am - 2:15 pm
ONT
-
MAD
18h 17m2 stops
Iberia Logo
1:00 pm - 10:48 pm
MAD
-
ONT
18h 48m1 stop
$519Iberia
Thu, Jan 22 - Wed, Jan 28
Delta Logo
6:00 am - 8:15 am
ONT
-
CDG
17h 15m1 stop
Delta Logo
8:10 am - 9:05 pm
CDG
-
ONT
21h 55m2 stops
$560Delta
Sun, Apr 5 - Fri, Apr 17
American Airlines Logo
12:18 pm - 12:25 am
ONT
-
IST
26h 07m2 stops
American Airlines Logo
8:20 am - 9:56 pm
IST
-
ONT
23h 36m2 stops
$574American Airlines
Sun, Mar 29 - Wed, Apr 29
Delta Logo
10:25 pm - 11:00 am
ONT
-
ATH
26h 35m1 stop
Delta Logo
9:10 am - 8:58 pm
ATH
-
ONT
21h 48m1 stop
$586Delta
Sun, Mar 1 - Tue, Mar 10
Iberia Logo
7:10 am - 12:40 pm
ONT
-
BCN
20h 30m2 stops
Iberia Logo
9:15 pm - 11:59 pm
BCN
-
ONT
34h 44m2 stops
$655Iberia
Thu, Jan 22 - Wed, Feb 4
American Airlines Logo
7:16 am - 1:45 pm
ONT
-
PMI
21h 29m2 stops
American Airlines Logo
9:15 am - 10:48 pm
PMI
-
ONT
22h 33m2 stops
$794American 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 February, when tickets cost $657 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,054 and $942 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$225
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 23% increase in price.
Flight from Ontario to Rome

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.

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 8012 reviews
7.3Food
8.1Boarding
8.5Crew
7.9Comfort
7.9Entertainment
Airline reviews

The flight was delayed for about 2 hrs. Other than it, it was good.

8.0 ExcellentWen, Dec 2025
LAX - MSY
Read more Delta reviews

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.

This was an older airplane. The cabin was constantly warm to hot throughout the 10 hour flight and there were no vents to personalize air flow. Also since it was an older plane, the material and comfort of the chairs were very uncomfortable. I left my flight with major soreness on my tailbone.

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

My experience on this United Airlines flight was highly uncomfortable, primarily due to two issues: Cabin Temperature: The temperature on the Boeing 737 MAX 8 was unacceptably high, feeling consistently around 80 degrees throughout the flight. This made sleeping impossible and significantly detracted from the experience. Seating Arrangement: Being stuck in a middle seat for a six-and-a-half-hour overnight flight compounded the discomfort. Moving forward, I will always purchase a seat assignment to avoid this situation.

Premium Plus is a really good idea for longer flights

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

The flight attendants were great, I joked with one I can’t remember her name, a blond, really sweet. I thought it was run well very professional. This was great i survived Spirit, I know for which I speak.

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

Not great. Booked Extra seats and got nothing extra at all. It’s basically a big budget airline.

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

The flight was flawless and we even arrived between 20 and 25 minutes early!

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

The entertainment package was vast and the selections were very current. Keep updating it was great.

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.

Suddenly, I don't find my flight back on the app Help Ticket 0757345716866 Hoeflich Flight back Sunday ib5333 Ib2629 Ib4268

Was all good.l including a sofdrink. AA improved significantly. There was no entertainment.

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

The seats are so small that you can barely move at all. Don't try to eat with utensils in your seat either - you will elbow your neighbor in the face. Miserably small and I swear they are shrinking every time I fly. Food was meh (per usual), but at least there is free alcohol on an overseas flight. Doesn't make up for sitting in a torture chamber while hurtling through the air with hundreds of fussy people, but it's something. Entertainment options (movies, shows) are okay, nothing special, but at least there are screens, because most of the seats in these large planes do not have adjustable lighting - or air control - that you can get to, it's too high to reach - which makes reading impossible. Zero stars, AA.

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

We departed late but made up most of the time in flight. Our ticket was pure economy, so it wasn’t anything fancy; however, I heard that we arrived in Madrid at the exact same time that First Class passengers arrived! Overall, our experience was similar to what we had on other American Airlines transatlantic flights - good value at a reasonable price. We were even able to get our carry-on baggage onto the plane without needing to gate check it.

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Plane was extremely delayed, but not all of it was BA fault (some was). Worst part was lack of room - this had as much space as an Allegiant flight. I thought transatlantic usually gave you an extra inch or two, but not this one. Entertainment system sporadically worked and didn’t have great options. Overhead bins are old and tiny, not as good as aunties new planes.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Airlines have to stop assuming passengers bring entertainment. Provide it like you used to in business class and above!! N

Need to offer Better food from LAX to London Service from London to Delhi very delayed after take off.

Great crew and food and beverage. Seating tight but not the airline's fault. Will definitely fly BA in future!

Crying baby the ENTIRE flight. Not your fault, but I paid 2700 for a premium economy ticket and it wasn't worth it. should have just stuck with coach. flight attendants very mediocre - minimal effort. Plane didn't seem very clean. Didn't have any cleansing wipes - most airlines give you this when you board. Flat screen scrolling didn't work. Toiletry case a joke - why bother at all?

Everything you need to know for your flight to Europe

Information on your arrival and departure airports