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Ontario

$451+ Cheap flights from Europe to Ontario (ONT)

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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — ONT
Mar 11 — Mar 181
Wed 3/11
Wed 3/18
1 adult, Economy
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Cheap flight deals from Europe to Ontario

Cheapest flights from Europe to Ontario
Explore the most affordable flight options available from Europe to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 9, 2026.

This United Airlines deal was found by Cheapflights users on 2/7. 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.
Fri 3/61:30 pm
LHR
-
ONT
2 stops17h 27m
United Airlines
Thu 3/191:40 pm
ONT
-
LHR
1 stop15h 20m
United Airlines
Deal found 2/7$492
This United Airlines deal was found by Cheapflights users on 2/8. 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 3/11:30 pm
LHR
-
ONT
2 stops17h 27m
United Airlines
Wed 3/116:00 am
ONT
-
LHR
2 stops17h 20m
United Airlines
Deal found 2/8$493
This United Airlines deal was found by Cheapflights users on 2/7. 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 3/2410:05 am
LHR
-
ONT
1 stop14h 36m
United Airlines
Sun 3/296:05 am
ONT
-
LHR
1 stop17h 35m
United Airlines
Deal found 2/7$532
This United Airlines deal was found by Cheapflights users on 2/9. 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 2/2810:05 am
LHR
-
ONT
1 stop15h 36m
United Airlines
Sun 3/86:15 am
ONT
-
LHR
1 stop18h 10m
United Airlines
Deal found 2/9$533
This United Airlines deal was found by Cheapflights users on 2/7. 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 3/251:45 pm
LHR
-
ONT
1 stop16h 12m
United Airlines
Thu 4/21:34 pm
ONT
-
LHR
1 stop14h 46m
United Airlines
Deal found 2/7$541
This United Airlines deal was found by Cheapflights users on 2/8. 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 3/2510:05 am
LHR
-
ONT
1 stop14h 36m
United Airlines
Wed 4/111:05 am
ONT
-
LHR
2 stops17h 15m
United Airlines
Deal found 2/8$543
This Expedia deal was found by Cheapflights users on 2/8. 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 2/281:25 pm
LHR
-
ONT
2 stops31h 18m
Air Canada
Sun 3/86:15 am
ONT
-
LHR
2 stops41h 15m
Air Canada
Deal found 2/8$556
This Expedia deal was found by Cheapflights users on 2/6. 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.
Thu 2/194:30 pm
LHR
-
ONT
1 stop15h 29m
British Airways
Mon 2/232:39 pm
ONT
-
LHR
1 stop13h 01m
British Airways
Deal found 2/6$570
This Expedia deal was found by Cheapflights users on 2/9. 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 2/287:40 pm
LHR
-
ONT
2 stops34h 49m
Iberia
Sun 3/86:00 am
ONT
-
LHR
1 stop22h 40m
Iberia
Deal found 2/9$572
This lol.travel deal was found by Cheapflights users on 2/7. 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.
Tue 3/1711:35 am
FCO
-
ONT
1 stop30h 31m
British Airways
Tue 3/317:00 am
ONT
-
FCO
1 stop20h 05m
British Airways
Deal found 2/7$619
This lol.travel deal was found by Cheapflights users on 2/8. 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.
Thu 3/2611:35 am
FCO
-
ONT
1 stop18h 55m
British Airways
Tue 4/76:00 am
ONT
-
FCO
1 stop21h 05m
British Airways
Deal found 2/8$625
This lol.travel deal was found by Cheapflights users on 2/7. 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.
Thu 4/21:10 pm
FCO
-
ONT
1 stop19h 49m
British Airways
Sun 4/52:39 pm
ONT
-
FCO
1 stop36h 26m
British Airways
Deal found 2/7$629

Find flight deals from Europe to Ontario

Keep the following information in mind while searching for Europe to Ontario flight deals. Data was last updated February 9, 2026.

Round-trip from

$492
(United Airlines)

One-way from

$451
(United Airlines)

Popular in

August

Cheapest in

February

Average price

$699
From Europe to Ontario
Search Deals
One-way flight from Europe to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Europe to Ontario 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 February 9, 2026.
Use the filters below to find and compare flights from Europe to Ontario that are best for you.

Fly from

Europe

Fly to

Ontario

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 3/6

11:35 am-8:50 pm

1 stop17h 15m

Ontario

Thu 3/19

1:40 pm-12:00 pm

1 stop15h 20m

$524

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 3/1

10:05 am-5:41 pm

1 stop15h 36m

Ontario

Wed 3/11

6:15 am-7:25 am

1 stop18h 10m

$525

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 2/28

10:05 am-5:41 pm

1 stop15h 36m

Ontario

Sun 3/8

6:15 am-7:25 am

1 stop18h 10m

$533

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 3/25

1:35 pm-10:18 pm

1 stop15h 43m

Ontario

Wed 4/1

7:00 am-6:55 am

2 stops15h 55m

$541

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 3/1

8:20 am-6:42 pm

1 stop18h 22m

Ontario

Mon 3/9

2:39 pm-12:15 pm

1 stop14h 36m

$589

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 7/28

12:55 pm-7:52 pm

1 stop14h 57m

Ontario

Mon 8/31

10:50 am-9:00 am

1 stop14h 10m

$594

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 4/22

10:05 am-4:22 pm

1 stop14h 17m

Ontario

Sun 4/26

10:59 am-8:05 am

1 stop13h 06m

$604

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 4/13

10:05 am-4:22 pm

1 stop14h 17m

Ontario

Thu 4/23

10:59 am-8:05 am

1 stop13h 06m

$604

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 2/27

12:10 pm-11:59 pm

1 stop19h 49m

Ontario

Sun 3/8

6:00 am-8:15 am

1 stop19h 15m

$608

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 3/8

11:45 am-9:24 pm

1 stop16h 39m

Ontario

Wed 3/18

11:58 pm-6:50 am

1 stop23h 52m

$617

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/6

Showing 1-10 of 60 results
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Best time to book a flight from Europe to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Europe 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 Europe to Ontario

What is the cheapest month to book a flight from Europe to Ontario?

Currently, May is the cheapest month in which you can book a flight from Europe to Ontario (average of $264). Flying from Europe to Ontario in March is currently the most expensive (average of $440). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated February 9, 2026.
See what other customers who have flown with United Airlines from Europe to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,262 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,262 reviews
United Airlines
7.4
Good
9,262 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

Find useful and relevant information for your journey from Europe to Ontario. 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 into for flights to Ontario from Europe?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from Europe.

  • How long is the flight from Europe to Ontario?

    United Airlines, American Airlines, and Delta can get you from Europe to Ontario in just under 17h 15m. Your travel time can differ by up to 8h 39m. Europe and Ontario are separated by a distance of 5407 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Europe to Ontario?

    Most travelers choose Paris Charles de Gaulle - Ontario, London Heathrow - Ontario or Warsaw Frederic Chopin - Ontario when deciding on the best route from Europe to Ontario.

  • Can I find deals for flights from Europe to Ontario that include hotel bookings?

    Yes. In addition to deals on Europe to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Europe to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Europe to Ontario.

  • Can I find deals for business class flights from Europe to Ontario?

    Yes. Cheapflights offers flight deals from Europe to Ontario 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 Europe to Ontario?

    Currently, May is the cheapest month in which you can book a flight from Europe to Ontario (average of $264). Flying from Europe to Ontario in March is currently the most expensive (average of $440). 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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