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$239+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
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 December 28, 2025.

This United Airlines deal was found by Cheapflights users on 12/25. 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.
Tue 12/306:00 amONT - WAW
2 stops21h 55mUnited Airlines
Wed 2/186:30 amWAW - ONT
2 stops39h 08mUnited Airlines
Deal found 12/25$499
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Wed 12/3110:42 amONT - WAW
2 stops17h 13mUnited Airlines
Wed 2/181:35 pmWAW - ONT
2 stops18h 22mUnited Airlines
Deal found 12/25$502
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:05 amONT - FCO
2 stops18h 25mUnited Airlines
Wed 1/147:05 amFCO - ONT
2 stops24h 48mUnited Airlines
Deal found 12/26$506
This Delta deal was found by Cheapflights users on 12/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:05 amONT - FCO
1 stop18h 25mDelta
Wed 1/146:10 amFCO - ONT
2 stops23h 55mDelta
Deal found 12/26$508
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2911:59 pmONT - FCO
2 stops23h 31mUnited Airlines
Wed 1/147:05 amFCO - ONT
2 stops19h 38mUnited Airlines
Deal found 12/26$510
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/301:40 pmONT - FCO
2 stops34h 40mUnited Airlines
Fri 1/1612:20 pmFCO - ONT
2 stops32h 57mUnited Airlines
Deal found 12/26$511
This Delta deal was found by Cheapflights users on 12/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:29 pmONT - FCO
1 stop24h 26mDelta
Fri 1/1612:40 pmFCO - ONT
1 stop31h 51mDelta
Deal found 12/26$512
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Mon 12/2910:42 amONT - WAW
2 stops18h 08mUnited Airlines
Wed 2/186:30 amWAW - ONT
2 stops25h 27mUnited Airlines
Deal found 12/25$512
This Delta deal was found by Cheapflights users on 12/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:29 pmONT - FCO
2 stops25h 11mDelta
Tue 1/1312:45 pmFCO - ONT
2 stops41h 20mDelta
Deal found 12/26$513
This Delta deal was found by Cheapflights users on 12/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:05 amONT - FCO
1 stop18h 25mDelta
Fri 1/166:00 amFCO - ONT
2 stops25h 38mDelta
Deal found 12/26$514
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:40 pmONT - FCO
2 stops24h 20mUnited Airlines
Fri 1/1612:20 pmFCO - ONT
2 stops32h 57mUnited Airlines
Deal found 12/26$515
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:05 amONT - FCO
2 stops41h 50mUnited Airlines
Fri 1/167:00 amFCO - ONT
2 stops43h 51mUnited Airlines
Deal found 12/26$517

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 December 28, 2025.

Round-trip from

$475
(oojo)

One-way from

$230
(oojo)

Popular in

June

Cheapest in

February

Average price

$1,266
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 December 2025
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 December 28, 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

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 4/6

5:02 pm-9:00 pm

2 stops18h 58m

Warsaw Frederic Chopin

Tue 4/14

8:55 am-5:45 pm

2 stops17h 50m

$475

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Wed 2/18

5:06 pm-9:30 pm

2 stops19h 24m

Warsaw Frederic Chopin

Wed 3/4

7:20 am-10:19 pm

2 stops23h 59m

$487

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/18

5:02 pm-9:55 pm

2 stops19h 53m

Rome Fiumicino

Wed 4/22

1:25 pm-11:40 pm

1 stop19h 15m

$496

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 1/13

6:32 pm-10:30 pm

2 stops18h 58m

Warsaw Frederic Chopin

Fri 1/23

9:20 am-10:53 pm

2 stops22h 33m

$500

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 3/29

5:10 am-10:05 pm

2 stops31h 55m

Warsaw Frederic Chopin

Sun 4/19

6:40 am-9:50 pm

2 stops24h 10m

$503

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Thu 2/19

6:37 pm-10:30 pm

2 stops18h 53m

Warsaw Frederic Chopin

Thu 3/5

2:30 pm-10:57 pm

2 stops17h 27m

$503

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 1/18

6:00 am-10:30 pm

2 stops31h 30m

Warsaw Frederic Chopin

Sun 2/1

2:30 pm-10:53 pm

2 stops17h 23m

$503

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sat 1/17

1:53 pm-4:30 pm

2 stops41h 37m

Warsaw Frederic Chopin

Sat 1/31

1:35 pm-10:53 pm

2 stops18h 18m

$505

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Sun 3/15

6:00 am-4:30 pm

2 stops26h 30m

Warsaw Frederic Chopin

Mon 3/23

6:30 am-10:25 pm

2 stops23h 55m

$505

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 2/24

6:10 am-7:45 am

2 stops16h 35m

Rome Fiumicino

Tue 3/3

9:45 am-10:00 pm

2 stops21h 15m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

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 $339). 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 December 28, 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
8,016 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

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
8,016 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

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
9,114 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

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
11,071 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

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
3,059 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

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
7,616 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

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 $475, British Airways can have you in Europe from Ontario in 18h 58m. Airlines will cover a distance of 5971 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 - Paris Charles de Gaulle. You may also consider Ontario - London Heathrow 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 $339). 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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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 December 28, 2025.
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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