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$256+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Jan 31 — Feb 71
Sat 1/31
Sat 2/7
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 January 1, 2026.

This oojo deal was found by Cheapflights users on 12/30. 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.
Wed 12/314:47 pmONT - FCO
2 stops17h 33mBritish Airways
Thu 1/88:10 pmFCO - ONT
2 stops30h 12mBritish Airways
Deal found 12/30$854
This Delta deal was found by Cheapflights users on 12/30. 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 12/317:05 amONT - MAD
1 stop17h 10mDelta
Tue 1/1311:15 amMAD - ONT
1 stop18h 50mDelta
Deal found 12/30$863
This Delta deal was found by Cheapflights users on 12/30. 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 12/316:00 amONT - MAD
2 stops17h 00mDelta
Wed 1/1410:00 amMAD - ONT
2 stops20h 05mDelta
Deal found 12/30$867
This United Airlines deal was found by Cheapflights users on 12/30. 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 12/3011:59 pmONT - MAD
2 stops23h 01mUnited Airlines
Tue 1/131:35 pmMAD - ONT
2 stops30h 43mUnited Airlines
Deal found 12/30$875
This United Airlines deal was found by Cheapflights users on 12/30. 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 12/3011:59 pmONT - MAD
2 stops24h 16mUnited Airlines
Mon 1/1211:15 amMAD - ONT
2 stops20h 38mUnited Airlines
Deal found 12/30$917
This KLM deal was found by Cheapflights users on 12/31. 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 12/3111:15 amONT - LHR
1 stop13h 45mKLM
Sun 1/1110:45 amLHR - ONT
1 stop13h 27mKLM
Deal found 12/31$999
This British Airways deal was found by Cheapflights users on 12/30. 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 12/3011:59 pmONT - MAD
1 stop24h 26mBritish Airways
Wed 1/1410:35 amMAD - ONT
2 stops18h 35mBritish Airways
Deal found 12/30$1,084
This Iberia deal was found by Cheapflights users on 12/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:10 amONT - MAD
1 stop17h 15mIberia
Wed 1/1412:40 pmMAD - ONT
1 stop19h 08mIberia
Deal found 12/30$1,091
This United Airlines deal was found by Cheapflights users on 12/30. 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 12/316:00 amONT - FCO
2 stops21h 40mUnited Airlines
Sun 1/49:40 amFCO - ONT
2 stops20h 27mUnited Airlines
Deal found 12/30$1,094
This oojo deal was found by Cheapflights users on 12/30. 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.
Wed 12/3110:47 amONT - ATH
2 stops22h 03mBritish Airways
Wed 1/78:20 pmATH - ONT
2 stops32h 25mBritish Airways
Deal found 12/30$1,119
This Iberia deal was found by Cheapflights users on 12/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:50 amONT - LHR
1 stop15h 10mIberia
Mon 1/123:45 pmLHR - ONT
2 stops30h 33mIberia
Deal found 12/29$1,158
This United Airlines deal was found by Cheapflights users on 12/30. 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 12/3110:42 amONT - FCO
2 stops22h 18mUnited Airlines
Wed 1/712:20 pmFCO - ONT
2 stops38h 23mUnited Airlines
Deal found 12/30$1,199

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 January 1, 2026.

Round-trip from

$490
(oojo)

One-way from

$256
(oojo)

Popular in

June

Cheapest in

February

Average price

$993
From Ontario to Europe
Search Deals
One-way flight from Ontario to Europe
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($204 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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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 January 1, 2026.
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

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sun 2/22

2:39 pm-1:20 am

2 stops24h 41m

Athens Eleftherios V.

Sun 3/8

8:00 am-10:59 pm

2 stops24h 59m

$491

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 2/17

1:45 pm-7:45 am

2 stops57h 00m

Rome Fiumicino

Thu 2/26

12:50 pm-8:50 pm

2 stops41h 00m

$495

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 3/18

6:37 pm-11:00 pm

2 stops20h 23m

Rome Fiumicino

Wed 4/1

12:25 pm-10:26 pm

2 stops43h 01m

$499

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

1:45 pm-11:00 pm

2 stops24h 15m

Rome Fiumicino

Tue 3/3

1:05 pm-8:50 pm

2 stops40h 45m

$501

OntarioRome

ONT - FCO

ONTFCO

Ontario

Thu 1/29

1:53 pm-9:25 am

2 stops34h 32m

Rome Fiumicino

Mon 2/2

7:05 am-10:53 pm

2 stops24h 48m

$509

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 2/14

1:45 pm-12:25 am

2 stops48h 40m

Athens Eleftherios V.

Sat 2/28

6:30 am-12:43 pm

2 stops40h 13m

$514

OntarioAthens

ONT - ATH

ONTATH

Ontario

Wed 1/28

8:00 am-4:35 pm

2 stops22h 35m

Athens Eleftherios V.

Wed 2/4

6:15 am-8:58 pm

2 stops24h 43m

$514

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

6:00 am-5:25 pm

2 stops26h 25m

Rome Fiumicino

Tue 3/3

12:40 pm-12:02 pm

1 stop32h 22m

$516

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 1/20

10:58 am-2:15 pm

2 stops18h 17m

Madrid Barajas

Wed 1/28

12:55 am-6:45 pm

1 stop26h 50m

$520

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 2/18

6:00 am-9:25 am

1 stop18h 25m

Madrid Barajas

Tue 2/24

12:40 pm-10:49 pm

1 stop19h 09m

$520

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/31

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, February is the cheapest month in which you can book a flight from Ontario to Europe (average of $340). 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 January 1, 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
8,017 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

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
8,017 reviews
Delta
7.9
Good
8,017 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

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
9,132 reviews
Delta
7.9
Good
8,017 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

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
11,072 reviews
Delta
7.9
Good
8,017 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

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
3,058 reviews
Delta
7.9
Good
8,017 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

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
7,633 reviews
Delta
7.9
Good
8,017 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

7.9

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 $491, British Airways can have you in Europe from Ontario in 23h 31m. Airlines will cover a distance of 6879 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 United Airlines, which is currently one of the cheapest options available, starting at $444. Delta flights start at $452 while deals on Virgin Atlantic start at $542 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, February is the cheapest month in which you can book a flight from Ontario to Europe (average of $340). 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 7 airlines flying from Ontario to Europe

Discover the top 7 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 January 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$903FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$469Average$653FlexibilityNo cancel feeOn-time72%
IberiaCheapest$497Average$823FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$517Average$939FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$568Average$866FlexibilityNo cancel feeOn-time69%
KLMCheapest$580Average$818FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$595Average$1,051FlexibilityNo cancel feeOn-time71%

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