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Cheap flights from London, ON to the United Kingdom from C$ 475

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LHR
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap flight deals from London to United Kingdom

Keep the following information in mind while searching for London to United Kingdom flight deals. Data was last updated 17 September 2025.

Round-trip from

C$ 889

One-way from

C$ 475

Popular in

December

Cheapest in

July

Average price

C$ 1,131
Air Canada
  • Air Canada
  • 1/10-14/10
  • 4 total stops
  • 41h 27m total
  • London to United Kingdom
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Air Canada
  • Air Canada
  • 30/10
  • 2 total stops
  • 11h 50m total
  • London to United Kingdom
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 181 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 68 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from London to United Kingdom

Cheapest flights from London to United Kingdom
Explore the most affordable flight options available from London to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Wed 1/109:55 a.m.YXU - LHR
1 stop19h 05mAir Canada
Tue 14/108:45 a.m.LHR - YXU
2 stops29h 32mAir Canada
Deal found 16/9C$ 889
Wed 24/910:00 a.m.YXU - LHR
2 stops15h 30mAir Canada
Mon 6/107:30 p.m.LHR - YXU
2 stops30h 57mAir Canada
Deal found 16/9C$ 894
Sat 4/103:40 p.m.YXU - LHR
1 stop9h 55mAir Canada
Wed 15/106:00 a.m.LHR - YXU
2 stops20h 27mAir Canada
Deal found 16/9C$ 905
Sat 4/106:15 a.m.YXU - LHR
1 stop22h 45mMultiple Airlines
Wed 15/106:00 a.m.LHR - YXU
2 stops20h 27mMultiple Airlines
Deal found 17/9C$ 911
Wed 24/910:00 a.m.YXU - LHR
2 stops15h 30mAir Canada
Wed 8/103:50 p.m.LHR - YXU
1 stop28h 12mAir Canada
Deal found 16/9C$ 915
Sat 4/103:40 p.m.YXU - LHR
1 stop9h 55mLufthansa
Wed 15/106:55 a.m.LHR - YXU
2 stops19h 32mLufthansa
Deal found 16/9C$ 955
Fri 31/109:25 a.m.YXU - EDI
2 stops20h 05mUnited Airlines
Fri 7/119:25 a.m.EDI - YXU
2 stops36h 40mUnited Airlines
Deal found 16/9C$ 1,044
Sat 1/115:40 p.m.YXU - EDI
2 stops34h 15mMultiple Airlines
Sat 8/115:45 p.m.EDI - YXU
2 stops44h 01mMultiple Airlines
Deal found 17/9C$ 1,107
Thu 16/106:00 a.m.YXU - LGW
2 stops34h 25mMultiple Airlines
Thu 23/108:00 a.m.LGW - YXU
3 stops26h 12mMultiple Airlines
Deal found 16/9C$ 1,190
Sat 4/103:40 p.m.YXU - LGW
2 stops15h 00mMultiple Airlines
Wed 15/1010:45 a.m.LGW - YXU
3 stops23h 27mMultiple Airlines
Deal found 16/9C$ 1,223
Fri 31/105:40 p.m.YXU - MAN
2 stops20h 15mMultiple Airlines
Fri 7/119:10 a.m.MAN - YXU
2 stops17h 11mMultiple Airlines
Deal found 16/9C$ 1,255
Sat 4/106:00 a.m.YXU - LGW
2 stops22h 25mWestJet
Wed 15/1010:45 a.m.LGW - YXU
2 stops47h 27mWestJet
Deal found 16/9C$ 1,268

Cheapflights Fare Finder

 
Customize your flight search to find flights from London 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 629,999 searches. Data last updated 17 September 2025.
Use the filters below to find and compare flights from London to the United Kingdom that are best for you.

Fly from

London

Fly to

United Kingdom

Route

Depart

Return

Price

LondonLondon

YXU - LHR

YXULHR

London

Wed 1/10

9:55 a.m.-10:00 a.m.

1 stop19h 05m

London Heathrow

Tue 14/10

8:45 a.m.-9:17 a.m.

2 stops29h 32m

C$ 889

LondonLondon

YXU - LHR

YXULHR

London

Tue 13/1

5:40 p.m.-8:30 a.m.

1 stop9h 50m

London Heathrow

Wed 21/1

9:00 a.m.-9:21 p.m.

2 stops17h 21m

C$ 893

LondonLondon

YXU - LHR

YXULHR

London

Sat 4/10

6:15 a.m.-6:30 a.m.

2 stops19h 15m

London Heathrow

Wed 15/10

6:00 a.m.-9:27 p.m.

2 stops20h 27m

C$ 905

LondonLondon

YXU - LHR

YXULHR

London

Sat 4/10

3:40 p.m.-6:35 a.m.

1 stop9h 55m

London Heathrow

Wed 15/10

6:00 a.m.-9:27 p.m.

2 stops20h 27m

C$ 905

LondonLondon

YXU - LHR

YXULHR

London

Wed 14/1

9:25 a.m.-6:30 a.m.

1 stop16h 05m

London Heathrow

Wed 21/1

1:00 p.m.-9:21 p.m.

1 stop13h 21m

C$ 919

LondonLondon

YXU - LHR

YXULHR

London

Sat 4/10

3:40 p.m.-6:35 a.m.

1 stop9h 55m

London Heathrow

Wed 15/10

6:55 a.m.-9:27 p.m.

2 stops19h 32m

C$ 955

LondonLondon

YXU - LHR

YXULHR

London

Fri 20/2

5:40 p.m.-8:30 a.m.

1 stop9h 50m

London Heathrow

Tue 24/2

6:00 p.m.-8:46 a.m.

1 stop19h 46m

C$ 964

LondonEdinburgh

YXU - EDI

YXUEDI

London

Fri 31/10

9:25 a.m.-9:30 a.m.

2 stops20h 05m

Edinburgh Turnhouse

Fri 7/11

9:25 a.m.-5:05 p.m.

2 stops36h 40m

C$ 1,044

LondonEdinburgh

YXU - EDI

YXUEDI

London

Sat 1/11

5:40 p.m.-7:55 a.m.

2 stops34h 15m

Edinburgh Turnhouse

Sat 8/11

5:45 p.m.-8:46 a.m.

2 stops44h 01m

C$ 1,107

LondonLondon

YXU - LGW

YXULGW

London

Thu 16/10

6:00 a.m.-9:25 p.m.

2 stops34h 25m

London Gatwick

Thu 23/10

8:00 a.m.-5:12 a.m.

3 stops26h 12m

C$ 1,190

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

Showing 1-10 of 46 results
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Best time to book a flight from London to United Kingdom

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

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

Currently, January is the cheapest month in which you can book a flight from London, Ontario to United Kingdom (average of C$ 560). Flying from London, Ontario to United Kingdom in July is currently the most expensive (average of C$ 856). 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 YXU to GB?

Find hourly flight availability from London 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 17 September 2025.

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

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 17 September 2025.
Get a feel of what it's like to fly with Air Canada from London to the United Kingdom by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,000 reviews
Check prices

Overall

7.1

Boarding

7.3

Crew

7.8

Comfort

7.1

Food

6.3

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews
Check prices

Overall

7.1

Boarding

7.3

Crew

7.8

Comfort

7.1

Food

6.3

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.

Related info for your journey

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

    London (YXU) is the airport you will fly out of if you book a flight from London to United Kingdom. It is only a 8.6 km journey to London (YXU) from London’s city centre.

  • How long is the flight from London, Ontario to United Kingdom?

    There are many flights that can get you from London, Ontario to United Kingdom in 19h 05m. Fly via Air Canada, United Airlines, or WestJet to get the fastest option. London, Ontario and United Kingdom are separated by a distance of 5844 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    While some choose either London - London City or London - London Gatwick, London - London Heathrow is the most popular route from London, Ontario to United Kingdom.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from London, Ontario to United Kingdom (average of C$ 560). Flying from London, Ontario to United Kingdom in July is currently the most expensive (average of C$ 856). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to United Kingdom

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

Discover the top airline that operate flights from London 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 629,999 searches. Data last updated 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 862AverageC$ 1,225FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from London to United Kingdom?

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Why should you use Cheapflights to find cheap flight tickets from London to United Kingdom?

Millions of users choose and trust Cheapflights to book the best flight deals from London to United Kingdom for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from London to United Kingdom with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to United Kingdom, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from London to United Kingdom become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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