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$241+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Dec 19 — Dec 261
Fri 12/19
Fri 12/26
1 adult, Economy
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Cheap flight deals from Ontario to Europe

Keep the following information in mind while searching for Ontario to Europe flight deals. Data was last updated November 19, 2025.

Round-trip from

$426
(Expedia)

One-way from

$241
(Finnair)

Popular in

June

Cheapest in

February

Average price

$867
From Ontario to Europe
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One-way flight from Ontario to Europe
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Highest demand for flights based on searches. 15% potential increase in price ($195 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 19, 2025.

This Delta deal was found by Cheapflights users on 11/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:05 amONT - MAD
1 stop17h 10mDelta
Thu 12/1111:15 amMAD - ONT
1 stop20h 49mDelta
Deal found 11/17$438
This KAYAK deal was found by Cheapflights users on 11/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:47 amONT - MAD
1 stop13h 38mBritish Airways
Thu 12/111:00 pmMAD - ONT
1 stop17h 07mBritish Airways
Deal found 11/17$466
This United Airlines deal was found by Cheapflights users on 11/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:05 amONT - MAD
2 stops17h 55mUnited Airlines
Thu 12/116:00 amMAD - ONT
2 stops20h 37mUnited Airlines
Deal found 11/17$487
This United Airlines deal was found by Cheapflights users on 11/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/309:35 pmONT - FCO
2 stops25h 10mUnited Airlines
Fri 12/121:10 pmFCO - ONT
3 stops42h 39mUnited Airlines
Deal found 11/17$488
This United Airlines deal was found by Cheapflights users on 11/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:41 pmONT - FCO
2 stops29h 44mUnited Airlines
Thu 12/1110:55 amFCO - ONT
3 stops44h 54mUnited Airlines
Deal found 11/18$490
This KLM deal was found by Cheapflights users on 11/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:05 amONT - FCO
1 stop15h 50mKLM
Wed 12/1010:05 amFCO - ONT
1 stop18h 34mKLM
Deal found 11/18$496
This American Airlines deal was found by Cheapflights users on 11/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:00 amONT - FCO
2 stops20h 20mAmerican Airlines
Thu 12/111:10 pmFCO - ONT
1 stop19h 45mAmerican Airlines
Deal found 11/17$502
This United Airlines deal was found by Cheapflights users on 11/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:00 amONT - FCO
1 stop15h 45mUnited Airlines
Tue 11/251:30 pmFCO - ONT
2 stops18h 21mUnited Airlines
Deal found 11/17$503
This United Airlines deal was found by Cheapflights users on 11/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/257:00 amONT - FCO
1 stop15h 45mUnited Airlines
Wed 12/37:00 amFCO - ONT
2 stops24h 49mUnited Airlines
Deal found 11/18$504
This United Airlines deal was found by Cheapflights users on 11/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:00 amONT - FCO
1 stop15h 45mUnited Airlines
Wed 12/109:45 amFCO - ONT
2 stops22h 04mUnited Airlines
Deal found 11/18$506
This Delta deal was found by Cheapflights users on 11/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:05 amONT - FCO
1 stop18h 25mDelta
Tue 12/169:20 amFCO - ONT
2 stops22h 44mDelta
Deal found 11/18$511
This Delta deal was found by Cheapflights users on 11/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:00 amONT - ATH
2 stops33h 15mDelta
Wed 12/1012:50 pmATH - ONT
2 stops32h 23mDelta
Deal found 11/17$512

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 November 19, 2025.
Use the filters below to find and compare flights from Ontario to Europe that are best for you.

Fly from

Ontario

Fly to

Europe

Route

Depart

Return

Price

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

7:05 am-9:15 am

1 stop17h 10m

Madrid Barajas

Thu 12/11

11:15 am-11:04 pm

1 stop20h 49m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 3/4

5:00 am-8:00 am

2 stops18h 00m

Madrid Barajas

Wed 3/11

12:35 pm-10:25 pm

2 stops41h 50m

$482

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

5:05 am-8:00 am

2 stops17h 55m

Madrid Barajas

Thu 12/11

6:00 am-5:37 pm

2 stops20h 37m

$487

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 2/3

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

Mon 2/9

6:25 am-10:53 pm

2 stops26h 28m

$499

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 2/12

5:00 am-6:05 pm

2 stops27h 05m

Athens Eleftherios V.

Fri 2/27

2:05 pm-10:57 pm

2 stops18h 52m

$499

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

8:00 am-8:30 am

2 stops39h 30m

Rome Fiumicino

Tue 3/3

1:05 pm-12:48 pm

2 stops56h 43m

$505

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 1/28

1:53 pm-8:30 am

2 stops33h 37m

Rome Fiumicino

Sun 2/1

12:45 pm-12:47 pm

2 stops57h 02m

$505

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 12/2

10:25 pm-7:55 am

1 stop24h 30m

Rome Fiumicino

Thu 12/11

12:40 pm-11:04 pm

1 stop19h 24m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 3/7

11:59 pm-8:30 am

2 stops23h 31m

Rome Fiumicino

Thu 3/19

7:05 am-10:36 pm

2 stops23h 31m

$507

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 2/17

6:00 am-8:30 am

2 stops17h 30m

Rome Fiumicino

Tue 2/24

7:05 am-8:50 pm

2 stops22h 45m

$507

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

Showing 1-10 of 60 results
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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, November is the cheapest month in which you can book a flight from Ontario to Europe (average of $343). 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.

What is the cheapest time of day to fly from ONT to EU?

Find hourly flight availability from Ontario to Europe. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 19, 2025.

One of the essential ways to save on airfare from Ontario to Europe is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 8% on airfare.

What is the cheapest day to fly from Ontario to Europe?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Europe. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Europe flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 19, 2025.
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
8,002 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

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
8,002 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

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
9,019 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

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
11,045 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

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
3,026 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

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
7,532 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Crew

8.5

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 $438, British Airways can have you in Europe from Ontario in 17h 10m. 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 British Airways, which is currently one of the cheapest options available, starting at $249. Iberia flights start at $336 while deals on Air Canada start at $395 one-way.

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

    The most popular route from Ontario to Europe is Ontario - Paris Charles de Gaulle. You may also consider Ontario - London Heathrow or Ontario - Palma de Mallorca Son Sant Joan.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Europe (average of $343). 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

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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 November 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$879FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$489Average$855FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$489Average$947FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$515Average$831FlexibilityNo cancel feeOn-time69%
KLMCheapest$580Average$818FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$595Average$1,101FlexibilityNo cancel feeOn-time71%

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