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$293+ 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$438
(Delta)

One-way from

$293
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$997
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 ($191 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 15, 2025.

This KLM deal was found by Cheapflights users on 9/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:05 amONT - MAD
1 stop17h 00mKLM
Thu 11/611:15 amMAD - ONT
1 stop17h 04mKLM
Deal found 9/15$438
This Delta deal was found by Cheapflights users on 9/14. 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 10/287:05 amONT - MAD
1 stop17h 00mDelta
Thu 11/610:00 amMAD - ONT
2 stops21h 22mDelta
Deal found 9/14$443
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/77:05 amONT - FCO
1 stop15h 50mDelta
Tue 12/2310:05 amFCO - ONT
1 stop21h 54mDelta
Deal found 9/15$467
This Delta deal was found by Cheapflights users on 9/13. 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.
Sat 11/85:50 pmONT - MAD
2 stops29h 10mDelta
Tue 11/186:00 amMAD - ONT
2 stops25h 55mDelta
Deal found 9/13$467
This Expedia deal was found by Cheapflights users on 9/13. 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.
Sat 11/812:53 pmONT - MAD
1 stop32h 22mIberia
Tue 11/189:40 pmMAD - ONT
2 stops47h 13mIberia
Deal found 9/13$473
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:25 pmONT - FCO
1 stop24h 30mDelta
Thu 12/412:40 pmFCO - ONT
1 stop19h 23mDelta
Deal found 9/15$475
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:00 amONT - MAD
2 stops25h 45mDelta
Wed 10/1510:05 amMAD - ONT
2 stops21h 36mDelta
Deal found 9/15$481
This lol.travel deal was found by Cheapflights users on 9/14. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/199:36 amONT - FCO
1 stop18h 44mUnited Airlines
Tue 11/47:00 amFCO - ONT
2 stops19h 34mUnited Airlines
Deal found 9/14$483
This United Airlines deal was found by Cheapflights users on 9/14. 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 12/75:05 amONT - FCO
2 stops41h 40mUnited Airlines
Wed 12/1712:45 pmFCO - ONT
2 stops42h 40mUnited Airlines
Deal found 9/14$488
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/257:00 amONT - FCO
2 stops19h 10mIberia
Wed 12/38:20 pmFCO - ONT
2 stops34h 59mIberia
Deal found 9/15$489
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/94:47 pmONT - FCO
2 stops18h 08mBritish Airways
Thu 11/207:40 amFCO - ONT
2 stops23h 43mBritish Airways
Deal found 9/15$493
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:05 amONT - MAD
1 stop17h 10mDelta
Wed 11/2611:15 amMAD - ONT
1 stop17h 22mDelta
Deal found 9/15$493

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 September 15, 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

Sun 10/26

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Fri 11/7

11:15 am-7:19 pm

1 stop17h 04m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 10/27

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Thu 11/6

11:15 am-7:19 pm

1 stop17h 04m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 10/28

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Fri 11/7

11:15 am-7:19 pm

1 stop17h 04m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 10/26

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Thu 11/6

11:15 am-7:19 pm

1 stop17h 04m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 10/28

7:05 am-8:05 am

1 stop17h 00m

Madrid Barajas

Thu 11/6

10:00 am-10:22 pm

2 stops21h 22m

$443

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 11/25

10:25 pm-7:55 am

1 stop24h 30m

Rome Fiumicino

Thu 12/4

12:40 pm-11:03 pm

1 stop19h 23m

$475

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 2/21

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Tue 3/3

12:40 pm-9:14 pm

1 stop17h 34m

$481

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 2/24

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Tue 3/3

12:40 pm-9:14 pm

1 stop17h 34m

$481

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 10/1

6:00 am-3:35 pm

2 stops24h 35m

Madrid Barajas

Wed 10/15

12:20 pm-10:41 pm

2 stops19h 21m

$481

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 11/25

11:45 am-7:55 am

1 stop35h 10m

Rome Fiumicino

Wed 12/3

6:10 am-5:08 pm

2 stops19h 58m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 $523). Flying from Ontario to Europe in June is currently the most expensive (average of $911). 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 September 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Europe as you normally would.

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 September 15, 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
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
2,924 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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
7,361 reviews
Delta
8.0
Very good
7,954 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

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 $438, Delta can have you in Europe from Ontario in 17h. 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 JetBlue, which is currently one of the cheapest options available, starting at $373. KLM flights start at $379 while deals on Delta start at $379 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 - Václav Havel Prague or Ontario - London Heathrow.

  • 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 $523). Flying from Ontario to Europe in June is currently the most expensive (average of $911). 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$861FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$469Average$884FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$489Average$892FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$492Average$877FlexibilityNo cancel feeOn-time69%
IberiaCheapest$496Average$837FlexibilityNo cancel feeOn-time77%
KLMCheapest$580Average$878FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$595Average$1,031FlexibilityNo cancel feeOn-time71%

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