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$170+ Cheap flights from Ontario (ONT) to the United Kingdom

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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LHR
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from Ontario to United Kingdom

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to United Kingdom (GB0). 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 November 21, 2024.

Find flight deals from Ontario to United Kingdom

Cheapest flights from Ontario to United Kingdom
Explore the most affordable flight options available from Ontario to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This Trip.com deal was found by Cheapflights users on 11/21. 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.
Thu 12/512:38 pmONT - LGW
1 stop13h 57mMultiple Airlines
Thu 12/1212:00 pmLGW - ONT
1 stop15h 59mMultiple Airlines
Deal found 11/21$745
This American Airlines deal was found by Cheapflights users on 11/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/246:05 amONT - LGW
2 stops17h 25mAmerican Airlines
Sun 1/1212:30 pmLGW - ONT
2 stops19h 28mAmerican Airlines
Deal found 11/21$834
This KLM deal was found by Cheapflights users on 11/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/87:10 amONT - LHR
1 stop20h 30mKLM
Fri 12/2012:40 pmLHR - ONT
1 stop18h 02mKLM
Deal found 11/21$858
This United Airlines deal was found by Cheapflights users on 11/20. 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 12/210:35 amONT - MAN
2 stops17h 20mUnited Airlines
Sun 12/812:50 pmMAN - ONT
2 stops19h 08mUnited Airlines
Deal found 11/20$860
This Delta deal was found by Cheapflights users on 11/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/241:05 pmONT - LHR
1 stop12h 55mDelta
Sun 1/1210:45 amLHR - ONT
1 stop13h 43mDelta
Deal found 11/21$869
This Finnair deal was found by Cheapflights users on 11/21. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/54:25 pmONT - LHR
1 stop12h 55mMultiple Airlines
Sun 12/82:30 pmLHR - ONT
1 stop15h 33mMultiple Airlines
Deal found 11/21$871
This Virgin Atlantic deal was found by Cheapflights users on 11/21. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2412:55 pmONT - LHR
2 stops15h 45mVirgin Atlantic
Sun 1/121:05 pmLHR - ONT
1 stop17h 27mVirgin Atlantic
Deal found 11/21$874
This Iberia deal was found by Cheapflights users on 11/21. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/62:54 pmONT - LHR
2 stops18h 21mIberia
Mon 12/99:25 amLHR - ONT
1 stop20h 48mIberia
Deal found 11/21$883
This British Airways deal was found by Cheapflights users on 11/21. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/512:53 pmONT - LHR
1 stop15h 12mBritish Airways
Sat 12/78:10 amLHR - ONT
2 stops22h 03mBritish Airways
Deal found 11/21$983
This Delta deal was found by Cheapflights users on 11/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/210:00 pmONT - MAN
1 stop25h 35mDelta
Thu 12/512:00 pmMAN - ONT
1 stop19h 01mDelta
Deal found 11/21$988
This British Airways deal was found by Cheapflights users on 11/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/410:43 amONT - EDI
2 stops16h 07mBritish Airways
Wed 12/117:25 amEDI - ONT
2 stops22h 48mBritish Airways
Deal found 11/20$1,059
This United Airlines deal was found by Cheapflights users on 11/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/96:10 amONT - LHR
1 stop17h 20mUnited Airlines
Tue 12/2410:05 amLHR - ONT
1 stop15h 48mUnited Airlines
Deal found 11/21$1,151

Find flights from Ontario to United Kingdom within your budget

Customize your flight search to find flights from Ontario to United Kingdom 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 2,612,795 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 1/16

7:56 am-10:35 am

1 stop18h 39m

London Gatwick

Sun 1/26

12:00 pm-11:07 am

1 stop31h 07m

$574

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Sun 1/12

5:10 am-7:55 am

2 stops18h 45m

Edinburgh Turnhouse

Wed 1/29

9:25 am-9:57 pm

2 stops20h 32m

$620

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 2/9

2:44 pm-12:05 pm

1 stop13h 21m

London Heathrow

Tue 2/18

6:10 am-10:00 pm

2 stops23h 50m

$664

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 1/19

2:44 pm-12:05 pm

1 stop13h 21m

London Heathrow

Wed 1/29

7:25 am-10:16 pm

2 stops22h 51m

$665

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 2/9

4:25 pm-1:20 pm

1 stop12h 55m

London Heathrow

Tue 2/18

10:40 am-10:00 pm

1 stop19h 20m

$674

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 4/15

12:39 pm-1:15 pm

1 stop16h 36m

London Heathrow

Fri 5/2

6:15 am-7:42 pm

2 stops21h 27m

$677

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 4/15

11:29 am-1:30 pm

1 stop18h 01m

London Heathrow

Fri 5/2

9:20 am-10:41 pm

1 stop21h 21m

$687

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 1/20

7:00 am-6:50 pm

2 stops27h 50m

London Gatwick

Thu 1/30

11:00 am-11:58 pm

2 stops20h 58m

$708

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 1/16

1:00 pm-10:35 am

1 stop13h 35m

London Heathrow

Sun 1/26

10:45 am-4:28 pm

1 stop13h 43m

$758

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 12/24

6:05 am-7:30 am

2 stops17h 25m

London Gatwick

Sun 1/12

12:30 pm-11:58 pm

2 stops19h 28m

$834

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

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

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

Travel insights for flights from Ontario to United Kingdom

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

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

Currently, November is the cheapest month in which you can book a flight from Ontario to United Kingdom (average of $648). Flying from Ontario to United Kingdom in June is currently the most expensive (average of $1,089). 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 GB?

Find hourly flight availability from Ontario to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

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

Rainfall in United Kingdom by month

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

In terms of precipitation, rainfall in United Kingdom ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit United Kingdom when rainfall is around 1.6 in.

Temperature in United Kingdom by month

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

If weather is an important factor for your trip to United Kingdom, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. 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 United Kingdom. Reviews last updated November 21, 2024.
Get a feel of what it's like to fly with Iberia, Delta and KLM from Ontario to United Kingdom by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,755 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,755 reviews
Delta
8.0
Very good
8,755 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,349 reviews
Delta
8.0
Very good
8,755 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.5
Good
663 reviews
Delta
8.0
Very good
8,755 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France
7.4
Good
1,525 reviews
Delta
8.0
Very good
8,755 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
9,172 reviews
Delta
8.0
Very good
8,755 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

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 United Kingdom. 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 United Kingdom?

    If you book a flight to United Kingdom from Ontario, you will be flying from 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 Ontario to United Kingdom one-way?

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $408. However, be on the lookout for offers from Delta and KLM, as they are both options that can get you from Ontario to United Kingdom for a low price.

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

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

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Ontario to United Kingdom (average of $648). Flying from Ontario to United Kingdom in June is currently the most expensive (average of $1,089). 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 United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to United Kingdom

Discover the top 5 airlines that operate flights from Ontario to United Kingdom. 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 2,612,795 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest$455Average$629FlexibilityNo cancel feeOn-time72%
DeltaCheapest$482Average$1,022FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$602Average$819FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$611Average$930FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$619Average$796FlexibilityNo cancel feeOn-time69%
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