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Ontario

$275+ Cheap flights from the United Kingdom 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 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ONT
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from United Kingdom to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from United Kingdom (GB0) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$491
(The Travel House)

One-way from

$275
(Kiwi.com)
From United Kingdom to Ontario
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One-way flight from United Kingdom to Ontario
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Find flight deals from United Kingdom to Ontario

Cheapest flights from United Kingdom to Ontario
Explore the most affordable flight options available from United Kingdom to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This The Travel House deal was found by Cheapflights users on 1/20. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/217:25 amLHR - ONT
2 stops21h 17mLufthansa
Mon 5/125:05 amONT - LHR
1 stop23h 15mLufthansa
Deal found 1/20$491
This United Airlines deal was found by Cheapflights users on 1/20. 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 3/108:45 amLHR - ONT
2 stops34h 59mUnited Airlines
Mon 3/175:05 amONT - LHR
1 stop21h 35mUnited Airlines
Deal found 1/20$492
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Mon 1/2712:30 pmLGW - ONT
2 stops33h 21mAmerican Airlines
Sun 2/96:00 amONT - LGW
2 stops41h 30mAmerican Airlines
Deal found 1/20$502
This The Travel House deal was found by Cheapflights users on 1/20. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/181:50 pmLHR - ONT
1 stop16h 26mFinnair
Mon 2/242:54 pmONT - LHR
1 stop13h 11mFinnair
Deal found 1/20$511
This TravelUp deal was found by Cheapflights users on 1/19. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1810:45 amLHR - ONT
1 stop13h 43mKLM
Wed 2/261:05 pmONT - LHR
1 stop13h 30mKLM
Deal found 1/19$515
This Lufthansa deal was found by Cheapflights users on 1/20. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/179:20 amLHR - ONT
1 stop20h 39mMultiple Airlines
Mon 2/246:00 amONT - LHR
1 stop17h 30mMultiple Airlines
Deal found 1/20$519
This TravelUp deal was found by Cheapflights users on 1/21. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/263:50 pmLHR - ONT
1 stop14h 42mVirgin Atlantic
Sun 3/21:10 pmONT - LHR
1 stop33h 10mVirgin Atlantic
Deal found 1/21$521
This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1810:40 amLHR - ONT
1 stop15h 55mBritish Airways
Tue 2/254:25 pmONT - LHR
1 stop12h 55mBritish Airways
Deal found 1/20$530
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 9/93:40 pmLHR - ONT
1 stop14h 00mAmerican Airlines
Mon 9/293:00 pmONT - LHR
1 stop13h 30mAmerican Airlines
Deal found 1/20$542
This Iberia deal was found by Cheapflights users on 1/19. 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.
Thu 2/2010:05 amLHR - ONT
2 stops21h 48mIberia
Wed 2/2610:51 amONT - LHR
1 stop17h 14mIberia
Deal found 1/19$559
This Delta deal was found by Cheapflights users on 1/19. 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.
Thu 2/2011:30 amLHR - ONT
2 stops19h 22mDelta
Wed 2/264:05 pmONT - LHR
2 stops20h 05mDelta
Deal found 1/19$562
This Trip.com deal was found by Cheapflights users on 1/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/2612:00 pmLGW - ONT
1 stop27h 11mMultiple Airlines
Sun 2/28:01 amONT - LGW
1 stop18h 34mMultiple Airlines
Deal found 1/21$576

Find flights from United Kingdom to Ontario within your budget

Customize your flight search to find flights from United Kingdom 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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 4/21

7:25 am-8:42 pm

2 stops21h 17m

Ontario

Mon 5/12

5:05 am-12:20 pm

1 stop23h 15m

$491

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 3/10

8:45 am-12:44 pm

2 stops34h 59m

Ontario

Mon 3/17

5:05 am-9:40 am

1 stop21h 35m

$492

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 2/18

1:50 pm-10:16 pm

1 stop16h 26m

Ontario

Mon 2/24

2:54 pm-12:05 pm

1 stop13h 11m

$511

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 2/18

10:45 am-4:28 pm

1 stop13h 43m

Ontario

Wed 2/26

1:05 pm-10:35 am

1 stop13h 30m

$515

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 2/17

9:20 am-9:59 pm

1 stop20h 39m

Ontario

Mon 2/24

6:00 am-7:30 am

1 stop17h 30m

$519

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 2/26

3:50 pm-10:32 pm

1 stop14h 42m

Ontario

Sun 3/2

1:10 pm-6:20 am

1 stop33h 10m

$521

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 2/18

10:40 am-6:35 pm

1 stop15h 55m

Ontario

Tue 2/25

4:25 pm-1:20 pm

1 stop12h 55m

$530

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/20

6:20 am-4:28 pm

2 stops18h 08m

Ontario

Wed 2/26

7:05 am-7:55 am

1 stop16h 50m

$541

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/20

10:05 am-11:53 pm

2 stops21h 48m

Ontario

Wed 2/26

10:51 am-12:05 pm

1 stop17h 14m

$559

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/20

11:30 am-10:52 pm

2 stops19h 22m

Ontario

Wed 2/26

4:05 pm-8:10 pm

2 stops20h 05m

$562

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

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

Have a flexible travel schedule? Discover the best time to fly to Ontario from United Kingdom 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.

Travel insights for flights from United Kingdom to Ontario

Get recent, data-driven insights about flights from United Kingdom to Ontario including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of $246). Flying from United Kingdom to Ontario in March is currently the most expensive (average of $310). 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 GB to ONT?

Find hourly flight availability from United Kingdom to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

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

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 January 21, 2025.
To help decide which airline to fly from United Kingdom to Ontario, see what other customers have to say about Virgin Atlantic, Delta and British Airways. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.5
Good
665 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France
7.4
Good
1,490 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from United Kingdom 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 United Kingdom?

    If you book a flight to Ontario from United Kingdom, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • What are the cheapest airlines to fly from United Kingdom to Ontario one-way?

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $533. However, be on the lookout for offers from Lufthansa and Iberia, as they are both options that can get you from United Kingdom to Ontario for a low price.

  • What are the most popular routes from United Kingdom to Ontario?

    Most travelers choose London Heathrow - Ontario, Manchester - Ontario or Birmingham - Ontario when deciding on the best route from United Kingdom to Ontario.

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

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

  • How can I find direct flights from United Kingdom to Ontario?

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to Ontario?

    Currently, August is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of $246). Flying from United Kingdom to Ontario in March is currently the most expensive (average of $310). 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 United Kingdom to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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