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$226+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Mar 29 — Apr 51
Sun 3/29
Sun 4/5
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 February 27, 2026.

This American Airlines deal was found by Cheapflights users on 2/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/22:39 pm
ONT
-
FCO
2 stops17h 16m
American Airlines
Tue 3/1011:35 am
FCO
-
ONT
1 stop19h 14m
American Airlines
Deal found 2/26$505
This United Airlines deal was found by Cheapflights users on 2/24. 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 8/106:30 am
ONT
-
FCO
1 stop16h 25m
United Airlines
Tue 8/259:45 am
FCO
-
ONT
1 stop21h 41m
United Airlines
Deal found 2/24$508
This American Airlines deal was found by Cheapflights users on 2/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:39 pm
ONT
-
FCO
2 stops19h 41m
American Airlines
Tue 3/31:10 pm
FCO
-
ONT
2 stops29h 56m
American Airlines
Deal found 2/25$509
This United Airlines deal was found by Cheapflights users on 2/23. 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 2/255:00 am
ONT
-
FCO
2 stops17h 45m
United Airlines
Tue 3/37:05 am
FCO
-
ONT
2 stops38h 43m
United Airlines
Deal found 2/23$511
This Air France deal was found by Cheapflights users on 2/26. 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 3/26:00 am
ONT
-
FCO
2 stops20h 45m
Multiple Airlines
Tue 3/106:10 am
FCO
-
ONT
2 stops22h 50m
Multiple Airlines
Deal found 2/26$514
This Delta deal was found by Cheapflights users on 2/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 am
ONT
-
FCO
2 stops26h 25m
Delta
Tue 3/312:40 pm
FCO
-
ONT
1 stop32h 22m
Delta
Deal found 2/24$517
This United Airlines deal was found by Cheapflights users on 2/25. 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 3/811:59 pm
ONT
-
FCO
1 stop23h 46m
United Airlines
Wed 3/187:00 am
FCO
-
ONT
2 stops23h 18m
United Airlines
Deal found 2/25$518
This oojo deal was found by Cheapflights users on 2/24. 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.
Sun 4/1910:55 am
ONT
-
MAD
1 stop13h 10m
British Airways
Fri 5/11:00 pm
MAD
-
ONT
1 stop19h 46m
British Airways
Deal found 2/24$520
This United Airlines deal was found by Cheapflights users on 2/23. 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.
Sat 4/111:27 pm
ONT
-
FCO
2 stops34h 48m
United Airlines
Thu 4/2311:30 am
FCO
-
ONT
2 stops43h 56m
United Airlines
Deal found 2/23$521
This British Airways deal was found by Cheapflights users on 2/24. 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.
Tue 4/212:08 pm
ONT
-
MAD
2 stops18h 22m
British Airways
Tue 4/2810:25 am
MAD
-
ONT
1 stop19h 02m
British Airways
Deal found 2/24$522
This oojo deal was found by Cheapflights users on 2/24. 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.
Sat 9/2611:59 pm
ONT
-
MAD
1 stop24h 06m
British Airways
Wed 10/712:20 pm
MAD
-
ONT
1 stop18h 31m
British Airways
Deal found 2/24$526
This United Airlines deal was found by Cheapflights users on 2/25. 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 3/811:59 pm
ONT
-
FCO
1 stop23h 46m
United Airlines
Thu 3/199:45 am
FCO
-
ONT
1 stop20h 33m
United Airlines
Deal found 2/25$528

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 February 27, 2026.

Round-trip from

$508
(United Airlines)

One-way from

$226
(oojo)

Popular in

June

Cheapest in

January

Average price

$745
From Ontario to Europe
Search Deals
One-way flight from Ontario to Europe
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($226 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 27, 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

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 4/13

1:27 pm-1:20 pm

1 stop14h 53m

Rome Fiumicino

Tue 4/21

2:20 pm-8:36 pm

1 stop15h 16m

$538

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 4/7

7:00 am-7:55 am

1 stop15h 55m

Rome Fiumicino

Thu 4/16

8:00 am-5:47 pm

2 stops18h 47m

$548

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 5/4

10:37 am-1:20 pm

1 stop17h 43m

Rome Fiumicino

Wed 5/20

3:40 pm-10:59 pm

1 stop16h 19m

$568

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 4/14

7:00 am-7:55 am

1 stop15h 55m

Rome Fiumicino

Sun 4/19

9:45 am-10:31 pm

1 stop21h 46m

$608

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 3/28

6:37 pm-1:20 pm

1 stop33h 43m

Rome Fiumicino

Sun 4/5

3:40 pm-10:45 pm

1 stop16h 05m

$628

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 4/15

7:00 am-8:05 am

2 stops16h 05m

Madrid Barajas

Wed 4/29

11:15 am-10:31 pm

2 stops20h 16m

$633

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 4/24

7:00 am-9:45 am

1 stop18h 45m

Dublin

Tue 4/28

9:50 am-5:47 pm

3 stops39h 57m

$666

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 4/15

12:49 pm-1:15 pm

1 stop16h 26m

London Heathrow

Tue 5/5

9:55 am-9:00 pm

2 stops19h 05m

$686

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 4/1

1:27 pm-11:10 am

1 stop13h 43m

London Heathrow

Tue 4/14

2:50 pm-8:36 pm

1 stop13h 46m

$704

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 4/19

4:52 pm-10:40 pm

2 stops20h 48m

Rome Fiumicino

Thu 4/30

6:50 am-9:59 pm

2 stops24h 09m

$708

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/27

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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, February is the cheapest month in which you can book a flight from Ontario to Europe (average of $337). Flying from Ontario to Europe in June is currently the most expensive (average of $582). 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 February 27, 2026.
See what other customers who have flown with Delta, United Airlines, and American 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
7.9
Good
8,242 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

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
7.9
Good
8,242 reviews
Delta
7.9
Good
8,242 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

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
9,351 reviews
Delta
7.9
Good
8,242 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

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
7.2
Good
11,357 reviews
Delta
7.9
Good
8,242 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

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
3,127 reviews
Delta
7.9
Good
8,242 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

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
7,772 reviews
Delta
7.9
Good
8,242 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Entertainment

7.8

Boarding

8.1

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 $538, United Airlines can have you in Europe from Ontario in 14h 53m. 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 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, February is the cheapest month in which you can book a flight from Ontario to Europe (average of $337). Flying from Ontario to Europe in June is currently the most expensive (average of $582). 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 February 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$439Average$812FlexibilityNo cancel feeOn-time71%
DeltaCheapest$444Average$888FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$497Average$737FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$504Average$986FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$515Average$858FlexibilityNo cancel feeOn-time69%
KLMCheapest$580Average$809FlexibilityNo cancel feeOn-time75%

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