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$280+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$445
(Delta)

One-way from

$280
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,037
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. 14% potential increase in price ($184 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 August 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 August 14, 2025.

This Delta deal was found by Cheapflights users on 8/12. 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 stops24h 35mDelta
Wed 10/156:00 amMAD - ONT
2 stops25h 41mDelta
Deal found 8/12$445
This American Airlines deal was found by Cheapflights users on 8/12. 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 10/2912:47 pmONT - DUB
2 stops15h 28mAmerican Airlines
Thu 11/611:30 amDUB - ONT
2 stops18h 29mAmerican Airlines
Deal found 8/12$486
This Billigflug deal was found by Cheapflights users on 8/14. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amONT - FCO
1 stop18h 30mAir France
Wed 11/2610:05 amFCO - ONT
1 stop18h 37mAir France
Deal found 8/14$489
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Wed 11/57:00 amONT - MXP
1 stop21h 05mUnited Airlines
Wed 11/193:05 pmMXP - ONT
1 stop16h 26mUnited Airlines
Deal found 8/14$490
This Iberia deal was found by Cheapflights users on 8/11. 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.
Sun 11/97:00 amONT - MAD
1 stop14h 15mIberia
Wed 11/191:00 pmMAD - ONT
1 stop18h 29mIberia
Deal found 8/11$497
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/226:00 amONT - MAD
2 stops39h 40mUnited Airlines
Tue 9/3012:45 pmMAD - ONT
2 stops42h 45mUnited Airlines
Deal found 8/12$499
This Netflights deal was found by Cheapflights users on 8/14. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/111:45 amONT - LHR
1 stop17h 45mVirgin Atlantic
Wed 9/101:25 pmLHR - ONT
1 stop17h 17mVirgin Atlantic
Deal found 8/14$500
This Iberia deal was found by Cheapflights users on 8/12. 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.
Mon 10/2710:57 amONT - FCO
2 stops20h 33mIberia
Thu 11/1311:35 amFCO - ONT
1 stop19h 48mIberia
Deal found 8/12$500
This United Airlines deal was found by Cheapflights users on 8/12. 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 10/41:15 pmONT - MAD
2 stops32h 25mUnited Airlines
Wed 10/2212:45 pmMAD - ONT
2 stops42h 45mUnited Airlines
Deal found 8/12$504
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Wed 11/125:05 amONT - FCO
2 stops18h 50mUnited Airlines
Wed 11/269:45 amFCO - ONT
1 stop21h 46mUnited Airlines
Deal found 8/14$506
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Tue 11/117:00 amONT - FCO
1 stop15h 45mUnited Airlines
Tue 11/187:05 amFCO - ONT
2 stops20h 31mUnited Airlines
Deal found 8/14$509
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:00 amONT - MXP
1 stop21h 05mUnited Airlines
Wed 11/123:05 pmMXP - ONT
1 stop16h 26mUnited Airlines
Deal found 8/13$510

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 August 14, 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

Wed 10/1

6:00 am-3:35 pm

2 stops24h 35m

Madrid Barajas

Wed 10/15

6:00 am-10:41 pm

2 stops25h 41m

$445

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

12:47 pm-11:15 am

2 stops15h 28m

Dublin

Thu 11/6

11:30 am-9:59 pm

2 stops18h 29m

$486

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 1/13

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Tue 1/27

12:40 pm-11:38 am

1 stop31h 58m

$487

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Wed 11/12

7:00 am-1:05 pm

1 stop21h 05m

Milan Malpensa

Wed 11/26

3:05 pm-10:31 pm

1 stop16h 26m

$490

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Tue 11/4

7:00 am-1:05 pm

1 stop21h 05m

Milan Malpensa

Fri 11/14

3:05 pm-10:31 pm

1 stop16h 26m

$490

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Wed 11/5

7:00 am-1:05 pm

1 stop21h 05m

Milan Malpensa

Fri 11/14

3:05 pm-10:31 pm

1 stop16h 26m

$490

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Wed 11/5

7:00 am-1:05 pm

1 stop21h 05m

Milan Malpensa

Wed 11/19

3:05 pm-10:31 pm

1 stop16h 26m

$490

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Tue 11/4

7:00 am-1:05 pm

1 stop21h 05m

Milan Malpensa

Wed 11/12

3:05 pm-10:31 pm

1 stop16h 26m

$490

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Wed 11/5

7:00 am-1:05 pm

1 stop21h 05m

Milan Malpensa

Wed 11/12

3:05 pm-10:31 pm

1 stop16h 26m

$490

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 11/11

7:00 am-6:15 am

1 stop14h 15m

Madrid Barajas

Wed 11/19

1:00 pm-10:29 pm

1 stop18h 29m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

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 August 14, 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 August 14, 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
7,980 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
7,980 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
2,878 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
7,266 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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.

  • 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 $318. JetBlue flights start at $374 while deals on British Airways start at $382 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 - Rome Fiumicino 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$814FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$492Average$922FlexibilityNo cancel feeOn-time69%
IberiaCheapest$496Average$868FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$504Average$975FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$544Average$845FlexibilityNo cancel feeOn-time70%
KLMCheapest$580Average$895FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$629Average$889FlexibilityNo cancel feeOn-time72%

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