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$318+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Aug 7 — Aug 141
Fri 8/7
Fri 8/14
1 adult, Economy
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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 July 8, 2026.

This United Airlines deal was found by Cheapflights users on 7/3. 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 11/96:36 pm
ONT
-
OSL
2 stops36h 09m
United Airlines
Thu 11/126:15 am
OSL
-
ONT
2 stops23h 41m
United Airlines
Deal found 7/3$735
This Expedia deal was found by Cheapflights users on 7/6. 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.
Wed 10/214:29 pm
ONT
-
OSL
2 stops21h 56m
British Airways
Wed 11/46:55 am
OSL
-
ONT
2 stops20h 27m
British Airways
Deal found 7/6$745
This Air France deal was found by Cheapflights users on 7/7. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2612:18 pm
ONT
-
FCO
1 stop15h 02m
Multiple Airlines
Fri 11/136:10 am
FCO
-
ONT
2 stops21h 08m
Multiple Airlines
Deal found 7/7$746
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Wed 11/115:00 am
ONT
-
MAD
2 stops18h 00m
United Airlines
Wed 11/251:25 pm
MAD
-
ONT
2 stops38h 04m
United Airlines
Deal found 7/7$746
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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.
Mon 8/1710:54 am
ONT
-
FRA
1 stop14h 56m
Multiple Airlines
Mon 8/3111:30 am
FRA
-
ONT
1 stop14h 40m
Multiple Airlines
Deal found 7/8$747
This KLM deal was found by Cheapflights users on 7/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:05 am
ONT
-
FCO
1 stop20h 15m
KLM
Fri 11/131:30 pm
FCO
-
ONT
1 stop17h 44m
KLM
Deal found 7/7$747
This United Airlines deal was found by Cheapflights users on 7/5. 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.
Wed 11/186:00 am
ONT
-
MAD
2 stops16h 45m
United Airlines
Wed 11/251:25 pm
MAD
-
ONT
2 stops38h 04m
United Airlines
Deal found 7/5$748
This British Airways deal was found by Cheapflights users on 7/6. 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.
Mon 10/262:22 pm
ONT
-
FCO
2 stops21h 13m
British Airways
Fri 11/131:00 pm
FCO
-
ONT
1 stop29h 57m
British Airways
Deal found 7/6$749
This KLM deal was found by Cheapflights users on 7/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:05 am
ONT
-
FCO
2 stops18h 30m
KLM
Tue 11/101:30 pm
FCO
-
ONT
1 stop17h 44m
KLM
Deal found 7/8$751
This Air France deal was found by Cheapflights users on 7/7. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/812:00 pm
ONT
-
FCO
1 stop14h 20m
Multiple Airlines
Tue 12/221:30 pm
FCO
-
ONT
1 stop17h 44m
Multiple Airlines
Deal found 7/7$753
This Air France deal was found by Cheapflights users on 7/4. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:00 pm
ONT
-
FCO
1 stop14h 20m
Multiple Airlines
Wed 12/161:30 pm
FCO
-
ONT
1 stop17h 44m
Multiple Airlines
Deal found 7/4$755
This United Airlines deal was found by Cheapflights users on 7/3. 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.
Wed 8/121:56 pm
ONT
-
FCO
1 stop14h 44m
United Airlines
Tue 8/2511:30 am
FCO
-
ONT
2 stops44h 05m
United Airlines
Deal found 7/3$756

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 July 8, 2026.

Round-trip from

$735
(United Airlines)

One-way from

$318
(Cheapflightsfares)

Popular in

June

Cheapest in

February

Average price

$1,294
From Ontario to Europe
Search Deals
One-way flight from Ontario to Europe
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($297 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 8, 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

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Mon 11/9

6:36 pm-3:45 pm

2 stops36h 09m

Oslo Gardermoen

Thu 11/12

6:15 am-8:56 pm

2 stops23h 41m

$736

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 1/3

9:53 am-10:40 pm

2 stops27h 47m

Oslo Gardermoen

Sun 1/17

8:40 am-6:45 pm

2 stops19h 05m

$742

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 11/18

6:00 am-7:45 am

2 stops16h 45m

Madrid Barajas

Wed 11/25

1:25 pm-6:29 pm

2 stops38h 04m

$748

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Tue 12/1

12:55 pm-10:40 pm

2 stops24h 45m

Oslo Gardermoen

Tue 12/15

11:45 am-10:19 pm

2 stops19h 34m

$757

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 10/20

12:18 pm-12:15 pm

1 stop14h 57m

Madrid Barajas

Fri 10/30

11:55 am-10:01 pm

1 stop18h 06m

$763

OntarioFrankfurt am Main

ONT - FRA

ONTFRA

Ontario

Tue 11/10

1:52 pm-10:30 am

1 stop35h 38m

Frankfurt am Main

Thu 11/12

4:10 pm-6:29 pm

2 stops35h 19m

$767

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 8/17

7:05 am-10:00 am

1 stop16h 55m

Athens Eleftherios V.

Wed 9/2

9:45 am-7:53 pm

1 stop20h 08m

$775

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 8/10

12:33 pm-12:05 pm

1 stop14h 32m

Rome Fiumicino

Wed 8/26

1:10 pm-10:59 pm

1 stop18h 49m

$786

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Tue 8/25

1:18 pm-6:00 pm

2 stops19h 42m

Oslo Gardermoen

Tue 9/1

6:55 am-8:01 pm

2 stops22h 06m

$786

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 12/23

11:59 pm-5:10 pm

2 stops32h 11m

Oslo Gardermoen

Tue 12/29

11:50 am-12:20 pm

2 stops33h 30m

$790

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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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 January is currently the most expensive (average of $538). 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 July 8, 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.
Delta
7.8
Good
8,450 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

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.
Delta
7.8
Good
8,450 reviews
Delta
7.8
Good
8,450 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

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.
United Airlines
7.4
Good
9,953 reviews
Delta
7.8
Good
8,450 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

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.
American Airlines
7.1
Good
11,786 reviews
Delta
7.8
Good
8,450 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

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.
Iberia
7.0
Good
3,252 reviews
Delta
7.8
Good
8,450 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

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.
British Airways
6.7
Okay
8,105 reviews
Delta
7.8
Good
8,450 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

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 $747, United Airlines can have you in Europe from Ontario in 20h 15m. Airlines will cover a distance of 6303 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. American Airlines flights start at $483 while deals on United Airlines start at $633 one-way.

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

    The most popular route from Ontario to Europe is Ontario - London Heathrow. You may also consider Ontario - Paris Charles de Gaulle or Ontario - Rome Fiumicino.

  • 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 January is currently the most expensive (average of $538). 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

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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.
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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 July 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$504Average$876FlexibilityNo cancel feeOn-time70%
IberiaCheapest$511Average$687FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$515Average$909FlexibilityNo cancel feeOn-time69%
DeltaCheapest$557Average$1,006FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$620Average$650FlexibilityNo cancel feeOn-time71%
KLMCheapest$657Average$1,263FlexibilityNo cancel feeOn-time75%

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