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Cheap flights from London, ON to the United Kingdom from C$ 512

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LHR
17 May — 24 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to United Kingdom

Enter your travel dates to find the best prices.

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 April 2026.

Thu 28/59:30 a.m.
YXU
-
STN
2 stops30h 50m
Multiple Airlines
Thu 4/66:30 a.m.
STN
-
YXU
2 stops16h 03m
Multiple Airlines
Deal found 13/4C$ 983
Sat 18/45:10 a.m.
YXU
-
LHR
2 stops22h 20m
United Airlines
Sat 25/44:40 p.m.
LHR
-
YXU
2 stops29h 24m
United Airlines
Deal found 13/4C$ 1,074
Mon 8/612:20 p.m.
YXU
-
LHR
2 stops13h 35m
United Airlines
Fri 12/68:00 a.m.
LHR
-
YXU
2 stops29h 53m
United Airlines
Deal found 13/4C$ 1,075
Fri 29/59:30 a.m.
YXU
-
LHR
2 stops16h 25m
United Airlines
Fri 5/63:20 p.m.
LHR
-
YXU
2 stops22h 33m
United Airlines
Deal found 14/4C$ 1,077
Wed 13/59:30 a.m.
YXU
-
LHR
2 stops15h 25m
United Airlines
Fri 22/512:15 p.m.
LHR
-
YXU
2 stops14h 23m
United Airlines
Deal found 16/4C$ 1,088
Thu 28/59:30 a.m.
YXU
-
LHR
2 stops16h 25m
Lufthansa
Thu 4/62:10 p.m.
LHR
-
YXU
2 stops23h 43m
Lufthansa
Deal found 13/4C$ 1,092
Sun 19/45:40 p.m.
YXU
-
LHR
2 stops31h 50m
Air Canada
Sat 2/56:00 a.m.
LHR
-
YXU
2 stops20h 38m
Air Canada
Deal found 12/4C$ 1,119
Fri 29/56:10 p.m.
YXU
-
LHR
1 stop12h 40m
Air Canada
Fri 5/66:00 a.m.
LHR
-
YXU
2 stops20h 38m
Air Canada
Deal found 14/4C$ 1,127
Thu 28/59:30 a.m.
YXU
-
LHR
1 stop16h 05m
Air Canada
Thu 4/68:45 a.m.
LHR
-
YXU
2 stops17h 53m
Air Canada
Deal found 13/4C$ 1,137
Wed 27/59:30 a.m.
YXU
-
EDI
2 stops17h 55m
Air Canada
Wed 3/69:00 a.m.
EDI
-
YXU
1 stop10h 58m
Air Canada
Deal found 12/4C$ 1,141
Wed 27/56:10 p.m.
YXU
-
LGW
2 stops21h 15m
Multiple Airlines
Wed 3/68:00 a.m.
LGW
-
YXU
3 stops18h 38m
Multiple Airlines
Deal found 12/4C$ 1,181
Sun 14/69:30 a.m.
YXU
-
EDI
1 stop16h 50m
Air Canada
Thu 18/69:00 a.m.
EDI
-
YXU
1 stop13h 32m
Air Canada
Deal found 15/4C$ 1,192

Find 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 April 2026.

Round-trip from

C$ 983

One-way from

C$ 512

Popular in

August

Cheapest in

July

Average price

C$ 1,147
28/5-4/6
  • 28/5-4/6
  • 4 total stops
  • 46h 53m total
  • London to United Kingdom
Search Deals
WestJet
  • WestJet
  • 30/5
  • 1 total stop
  • 34h 55m total
  • London to United Kingdom
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 141 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 85 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 April 2026.
Use the filters below to find and compare flights from London to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonLondon

YXU - STN

YXUSTN

London

Thu 28/5

9:30 a.m.-9:20 p.m.

2 stops30h 50m

London Stansted

Thu 4/6

6:30 a.m.-5:33 p.m.

2 stops16h 03m

C$ 994

LondonLondon

YXU - LHR

YXULHR

London

Sun 3/5

5:10 a.m.-5:55 a.m.

2 stops19h 45m

London Heathrow

Thu 7/5

8:00 a.m.-11:43 a.m.

2 stops32h 43m

C$ 1,074

LondonLondon

YXU - LHR

YXULHR

London

Wed 27/5

9:30 a.m.-6:45 a.m.

2 stops16h 15m

London Heathrow

Wed 3/6

4:40 p.m.-11:43 a.m.

2 stops24h 03m

C$ 1,074

LondonLondon

YXU - LHR

YXULHR

London

Mon 11/5

9:30 a.m.-6:45 a.m.

2 stops16h 15m

London Heathrow

Mon 18/5

12:15 p.m.-9:38 p.m.

2 stops14h 23m

C$ 1,074

LondonLondon

YXU - LHR

YXULHR

London

Mon 8/6

12:20 p.m.-6:55 a.m.

2 stops13h 35m

London Heathrow

Fri 12/6

8:00 a.m.-8:53 a.m.

2 stops29h 53m

C$ 1,075

LondonLondon

YXU - LHR

YXULHR

London

Tue 26/5

9:30 a.m.-9:00 a.m.

2 stops18h 30m

London Heathrow

Sat 30/5

8:00 a.m.-9:38 p.m.

2 stops18h 38m

C$ 1,077

LondonLondon

YXU - LHR

YXULHR

London

Fri 29/5

9:30 a.m.-6:45 a.m.

2 stops16h 15m

London Heathrow

Fri 5/6

3:20 p.m.-8:53 a.m.

2 stops22h 33m

C$ 1,077

LondonLondon

YXU - LHR

YXULHR

London

Tue 15/9

5:40 a.m.-9:20 a.m.

2 stops22h 40m

London Heathrow

Mon 21/9

7:45 a.m.-5:45 p.m.

2 stops15h 00m

C$ 1,081

LondonLondon

YXU - LHR

YXULHR

London

Wed 16/9

3:30 p.m.-9:20 a.m.

2 stops12h 50m

London Heathrow

Sun 20/9

7:45 a.m.-5:45 p.m.

2 stops15h 00m

C$ 1,081

LondonLondon

YXU - LHR

YXULHR

London

Mon 14/9

3:30 p.m.-10:25 a.m.

2 stops13h 55m

London Heathrow

Sun 20/9

7:45 a.m.-5:45 p.m.

2 stops15h 00m

C$ 1,081

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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
No data available for this route at this time. Please check back soon.

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 April 2026.
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
10,932 reviews
Check prices

Crew

7.8

Overall

7.1

Comfort

7.1

Boarding

7.3

Food

6.3

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Thomas,Apr 2026

YYZ - LHR

Food is sub par. I travel a lot and AC food is not good
Air Canada
7.1
Good
10,932 reviews
Air Canada
7.1
Good
10,932 reviews
Check prices

Crew

7.8

Overall

7.1

Comfort

7.1

Boarding

7.3

Food

6.3

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Thomas,Apr 2026

YYZ - LHR

Food is sub par. I travel a lot and AC food is not good

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 17h 55m. Fly via United Airlines, Air Canada, or WestJet to get the fastest option. London, Ontario and United Kingdom are separated by a distance of 5478 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 - Glasgow Intl 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.

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 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 860AverageC$ 1,221FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to United Kingdom from London today with Cheapflights!

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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