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$226+ 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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 18, 2025.

This Delta deal was found by Cheapflights users on 12/15. 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.
Mon 12/296:00 amONT - LHR
1 stop20h 00mDelta
Thu 1/85:35 pmLHR - ONT
2 stops37h 16mDelta
Deal found 12/15$669
This Air Canada deal was found by Cheapflights users on 12/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:05 amONT - LHR
2 stops41h 25mAir Canada
Fri 1/91:25 pmLHR - ONT
2 stops31h 22mAir Canada
Deal found 12/15$678
This Delta deal was found by Cheapflights users on 12/15. 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 12/306:00 amONT - LHR
2 stops23h 50mDelta
Thu 1/85:35 pmLHR - ONT
2 stops37h 16mDelta
Deal found 12/15$679
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:05 amONT - LHR
1 stop20h 35mUnited Airlines
Fri 1/98:00 amLHR - ONT
2 stops20h 58mUnited Airlines
Deal found 12/15$682
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/285:05 amONT - LIS
2 stops19h 05mUnited Airlines
Mon 1/1210:15 amLIS - ONT
2 stops18h 43mUnited Airlines
Deal found 12/17$701
This Delta deal was found by Cheapflights users on 12/16. 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 12/316:38 amONT - IST
2 stops23h 17mDelta
Thu 1/85:55 pmIST - ONT
2 stops33h 17mDelta
Deal found 12/16$727
This Booking.com deal was found by Cheapflights users on 12/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:05 amONT - LHR
2 stops22h 15mMultiple Airlines
Thu 1/812:05 pmLHR - ONT
1 stop17h 53mMultiple Airlines
Deal found 12/16$730
This Delta deal was found by Cheapflights users on 12/15. 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 12/306:00 amONT - LHR
1 stop20h 00mDelta
Sat 1/104:50 pmLHR - ONT
2 stops26h 41mDelta
Deal found 12/15$732
This United Airlines deal was found by Cheapflights users on 12/16. 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 - LHR
1 stop17h 25mUnited Airlines
Thu 1/812:05 pmLHR - ONT
1 stop17h 53mUnited Airlines
Deal found 12/16$733
This oojo deal was found by Cheapflights users on 12/16. 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 - CDG
2 stops20h 38mBritish Airways
Sat 1/177:05 amCDG - ONT
2 stops20h 40mBritish Airways
Deal found 12/16$752
This Finnair deal was found by Cheapflights users on 12/17. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2011:59 pmONT - FCO
2 stops24h 01mMultiple Airlines
Wed 2/256:40 pmFCO - ONT
2 stops37h 09mMultiple Airlines
Deal found 12/17$752
This United Airlines deal was found by Cheapflights users on 12/16. 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 - CDG
1 stop13h 58mUnited Airlines
Sat 1/1711:15 amCDG - ONT
2 stops20h 38mUnited Airlines
Deal found 12/16$757

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 18, 2025.

Round-trip from

$490
(oojo)

One-way from

$226
(oojo)

Popular in

June

Cheapest in

February

Average price

$1,259
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 ($200 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 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 18, 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

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 1/30

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Fri 2/6

10:55 am-9:58 pm

2 stops43h 03m

$494

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 1/13

6:00 am-9:20 am

2 stops19h 20m

Lisbon Humberto Delgado

Thu 1/22

5:00 am-5:43 pm

2 stops20h 43m

$497

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 2/18

8:00 am-8:10 am

2 stops16h 10m

Lisbon Humberto Delgado

Wed 2/25

5:00 am-8:50 pm

2 stops23h 50m

$499

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 1/26

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Mon 2/9

6:10 am-5:43 pm

2 stops19h 33m

$500

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 1/23

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Tue 1/27

6:10 am-5:43 pm

2 stops19h 33m

$500

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 1/25

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Mon 2/2

6:10 am-5:43 pm

2 stops19h 33m

$500

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 1/30

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Tue 2/3

6:10 am-5:55 pm

2 stops19h 45m

$500

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 1/13

7:30 am-11:20 am

2 stops19h 50m

Lisbon Humberto Delgado

Tue 1/20

5:00 am-9:05 pm

2 stops24h 05m

$501

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 1/27

4:45 pm-9:55 pm

2 stops20h 10m

Rome Fiumicino

Tue 2/24

8:25 pm-10:19 pm

2 stops34h 54m

$508

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 1/17

6:00 am-5:25 pm

2 stops26h 25m

Rome Fiumicino

Sat 1/31

12:40 pm-11:31 am

1 stop31h 51m

$516

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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 $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.

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 December 18, 2025.

One of the essential ways to save on airfare from Ontario to Europe is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 10% 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 December 18, 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
8,008 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

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
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

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
9,095 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

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
11,054 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

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
3,053 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

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
7,586 reviews
Delta
7.9
Good
8,008 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

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.

  • How long is the flight from Ontario to Europe?

    For as low as $494, United Airlines can have you in Europe from Ontario in 18h 10m. Airlines will cover a distance of 5634 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 - 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 $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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$769FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$469Average$765FlexibilityNo cancel feeOn-time72%
IberiaCheapest$497Average$841FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$515Average$866FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$517Average$940FlexibilityNo cancel feeOn-time70%
KLMCheapest$580Average$818FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$595Average$1,060FlexibilityNo cancel feeOn-time71%

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