Europe

$343+ Cheap flights from Ontario (ONT) to Europe

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Jun 19 — Jun 261
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Cheap flight deals from Ontario to Europe

Cheapest flights from Ontario to Europe
Explore the most affordable flight options available from Ontario to Europe. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 20, 2026.

This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:10 am
ONT
-
FCO
1 stop16h 45m
United Airlines
Tue 8/2511:30 am
FCO
-
ONT
2 stops39h 46m
United Airlines
Deal found 5/19$707
This oojo deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 am
ONT
-
FCO
1 stop18h 45m
British Airways
Tue 11/241:00 pm
FCO
-
ONT
1 stop19h 57m
British Airways
Deal found 5/16$723
This British Airways deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:33 pm
ONT
-
FCO
2 stops19h 32m
British Airways
Thu 8/271:30 pm
FCO
-
ONT
1 stop17h 34m
British Airways
Deal found 5/15$726
This Kiwi.com deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:00 am
ONT
-
FCO
1 stop20h 05m
Iberia
Thu 8/201:10 pm
FCO
-
ONT
1 stop17h 02m
Iberia
Deal found 5/17$727
This United Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:10 am
ONT
-
FCO
1 stop16h 45m
United Airlines
Wed 8/269:45 am
FCO
-
ONT
1 stop19h 12m
United Airlines
Deal found 5/16$728
This Mytrip deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:00 am
ONT
-
FCO
2 stops21h 45m
Air Canada
Thu 8/2712:25 pm
FCO
-
ONT
2 stops41h 28m
Air Canada
Deal found 5/18$731
This Cheapflightsfares deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:33 pm
ONT
-
FCO
1 stop14h 32m
British Airways
Wed 8/261:10 pm
FCO
-
ONT
1 stop17h 02m
British Airways
Deal found 5/15$733
This Expedia deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/410:25 am
ONT
-
FCO
1 stop16h 40m
Iberia
Thu 8/2712:00 pm
FCO
-
ONT
2 stops39h 47m
Iberia
Deal found 5/18$737
This British Airways deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:59 pm
ONT
-
FCO
1 stop27h 06m
British Airways
Fri 8/281:10 pm
FCO
-
ONT
1 stop29h 24m
British Airways
Deal found 5/15$739
This Cheapflightsfares deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:47 am
ONT
-
FCO
1 stop14h 58m
British Airways
Tue 12/11:00 pm
FCO
-
ONT
1 stop18h 23m
British Airways
Deal found 5/17$743
This Priceline deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2510:25 am
ONT
-
FCO
2 stops18h 00m
Multiple Airlines
Thu 11/511:10 am
FCO
-
ONT
2 stops21h 47m
Multiple Airlines
Deal found 5/19$744
This Cheapflightsfares deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:25 am
ONT
-
MAD
1 stop13h 40m
British Airways
Tue 10/2012:20 pm
MAD
-
ONT
1 stop15h 37m
British Airways
Deal found 5/16$751

Find flight deals from Ontario to Europe

Keep the following information in mind while searching for Ontario to Europe flight deals. Data was last updated May 20, 2026.

Round-trip from

$707
(United Airlines)

One-way from

$343
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$1,182
From Ontario to Europe
One-way flight from Ontario to Europe
Highest demand for flights based on searches. 22% potential increase in price ($286 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Average for round-trip flights in May 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Europe that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 20, 2026.
Use the filters below to find and compare flights from Ontario to Europe that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 10/18

12:00 pm-12:15 pm

1 stop15h 15m

Madrid Barajas

Fri 10/23

9:50 am-6:18 pm

1 stop17h 28m

$764

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 9/14

9:01 am-1:40 pm

1 stop19h 39m

Rome Fiumicino

Fri 9/25

9:45 am-10:26 pm

1 stop21h 41m

$787

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 9/20

6:00 am-2:25 pm

1 stop23h 25m

Madrid Barajas

Sat 9/26

3:55 pm-11:06 pm

1 stop16h 11m

$814

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sat 10/24

12:00 pm-10:55 am

1 stop13h 55m

Madrid Barajas

Fri 10/30

11:55 am-10:14 pm

1 stop18h 19m

$814

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sat 10/17

12:00 pm-12:15 pm

1 stop15h 15m

Madrid Barajas

Fri 10/23

9:50 am-6:18 pm

1 stop17h 28m

$814

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 8/19

9:01 am-2:55 pm

2 stops19h 54m

Athens Eleftherios V.

Fri 9/18

6:45 am-7:17 pm

2 stops22h 32m

$869

OntarioPalma de Mallorca

ONT - PMI

ONTPMI

Ontario

Sun 7/26

5:00 am-6:15 am

2 stops40h 15m

Palma de Mallorca Son Sant Joan

Wed 8/12

10:00 am-7:57 pm

2 stops18h 57m

$874

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Fri 8/21

7:05 am-8:55 am

1 stop16h 50m

Frankfurt am Main

Sun 9/6

10:40 am-6:01 pm

1 stop16h 21m

$890

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sat 9/19

5:00 am-9:50 am

3 stops19h 50m

Madrid Barajas

Sat 9/26

11:15 am-10:59 pm

2 stops20h 44m

$899

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 8/11

7:06 am-8:20 am

2 stops16h 14m

Madrid Barajas

Wed 9/2

11:45 am-10:58 pm

2 stops20h 13m

$910

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/17

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Ontario to Europe

Have a flexible travel schedule? Discover the best time to fly to Europe from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Europe

What is the cheapest month to book a flight from Ontario to Europe?

Currently, September is the cheapest month in which you can book a flight from Ontario to Europe (average of $251). Flying from Ontario to Europe in June is currently the most expensive (average of $575). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Europe

Get insights into the airlines that provide service to Europe. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Europe. Reviews last updated May 20, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from Ontario to Europe have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Overall

7.9

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Overall

7.9

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Overall

7.9

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Overall

7.9

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Overall

7.9

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Overall

7.9

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Europe. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Ontario to Europe?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Europe.

  • How long is the flight from Ontario to Europe?

    For as low as $764, KLM can have you in Europe from Ontario in 15h 15m. Airlines will cover a distance of 5790 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ontario to Europe one-way?

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $382. United Airlines flights start at $404 while deals on American Airlines start at $483 one-way.

  • What are the most popular routes from Ontario to Europe?

  • Can I find deals for flights from Ontario to Europe that include hotel bookings?

    Yes. In addition to deals on Ontario to Europe flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Europe?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Europe.

  • Can I find deals for business class flights from Ontario to Europe?

    Yes. Cheapflights offers flight deals from Ontario to Europe by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Europe?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Europe (average of $251). Flying from Ontario to Europe in June is currently the most expensive (average of $575). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Europe

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Ontario to Europe

Discover the top 6 airlines that operate flights from Ontario to Europe. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$497Average$695FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$504Average$919FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$515Average$876FlexibilityNo cancel feeOn-time69%
DeltaCheapest$557Average$973FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$580Average$967FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$620Average$890FlexibilityNo cancel feeOn-time71%

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