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Cheap flights from London, ON to the United Kingdom from C$ 661

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LHR
22 Apr — 29 Apr1
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 23 March 2026.

Sat 2/512:20 p.m.
YXU
-
STN
2 stops21h 10m
Multiple Airlines
Sat 9/56:35 a.m.
STN
-
YXU
2 stops15h 58m
Multiple Airlines
Deal found 18/3C$ 974
Fri 22/55:40 a.m.
YXU
-
LHR
2 stops20h 35m
United Airlines
Tue 26/54:40 p.m.
LHR
-
YXU
2 stops29h 53m
United Airlines
Deal found 19/3C$ 1,078
Tue 5/59:30 a.m.
YXU
-
LHR
2 stops21h 25m
United Airlines
Tue 12/58:00 a.m.
LHR
-
YXU
2 stops18h 38m
United Airlines
Deal found 21/3C$ 1,080
Mon 20/45:10 a.m.
YXU
-
LHR
2 stops20h 20m
Air Canada
Mon 27/48:40 a.m.
LHR
-
YXU
2 stops17h 39m
Air Canada
Deal found 23/3C$ 1,088
Sat 2/59:30 a.m.
YXU
-
LHR
2 stops18h 00m
United Airlines
Wed 6/512:15 p.m.
LHR
-
YXU
2 stops14h 23m
United Airlines
Deal found 18/3C$ 1,099
Thu 16/49:25 a.m.
YXU
-
LHR
2 stops16h 20m
United Airlines
Wed 29/411:05 a.m.
LHR
-
YXU
2 stops26h 39m
United Airlines
Deal found 18/3C$ 1,100
Tue 26/55:10 a.m.
YXU
-
LHR
1 stop20h 25m
Air Canada
Sat 30/58:30 a.m.
LHR
-
YXU
1 stop14h 03m
Air Canada
Deal found 22/3C$ 1,102
Tue 5/56:10 p.m.
YXU
-
LHR
1 stop9h 25m
Air Canada
Tue 12/58:30 a.m.
LHR
-
YXU
1 stop14h 03m
Air Canada
Deal found 21/3C$ 1,107
Thu 7/56:10 p.m.
YXU
-
LHR
1 stop10h 25m
Multiple Airlines
Thu 14/56:55 a.m.
LHR
-
YXU
2 stops15h 38m
Multiple Airlines
Deal found 23/3C$ 1,114
Thu 7/59:30 a.m.
YXU
-
LHR
1 stop18h 05m
Air Canada
Thu 14/52:10 p.m.
LHR
-
YXU
1 stop12h 28m
Air Canada
Deal found 23/3C$ 1,115
Mon 4/512:20 p.m.
YXU
-
LHR
2 stops13h 10m
Air Canada
Mon 11/58:30 a.m.
LHR
-
YXU
1 stop14h 03m
Air Canada
Deal found 20/3C$ 1,119
Tue 5/59:30 a.m.
YXU
-
STN
3 stops30h 25m
Multiple Airlines
Tue 12/58:15 a.m.
STN
-
YXU
3 stops18h 23m
Multiple Airlines
Deal found 21/3C$ 1,151

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 23 March 2026.

Round-trip from

C$ 974

One-way from

C$ 610

Popular in

August

Cheapest in

July

Average price

C$ 914
2/5-9/5
  • 2/5-9/5
  • 4 total stops
  • 37h 08m total
  • London to United Kingdom
Search Deals
2/5
  • 2/5
  • 2 total stops
  • 45h 45m total
  • London to United Kingdom
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 223 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 93 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 23 March 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

Sat 2/5

12:20 p.m.-2:30 p.m.

2 stops21h 10m

London Stansted

Sat 9/5

6:35 a.m.-5:33 p.m.

2 stops15h 58m

C$ 974

LondonLondon

YXU - LHR

YXULHR

London

Wed 13/5

12:20 p.m.-10:40 a.m.

2 stops17h 20m

London Heathrow

Sat 23/5

4:40 p.m.-8:53 a.m.

2 stops21h 13m

C$ 1,078

LondonLondon

YXU - LHR

YXULHR

London

Fri 22/5

5:40 a.m.-7:15 a.m.

2 stops20h 35m

London Heathrow

Tue 26/5

4:40 p.m.-5:33 p.m.

2 stops29h 53m

C$ 1,078

LondonLondon

YXU - LHR

YXULHR

London

Tue 5/5

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

2 stops16h 15m

London Heathrow

Tue 12/5

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

2 stops14h 23m

C$ 1,080

LondonLondon

YXU - LHR

YXULHR

London

Sat 18/4

5:40 p.m.-6:45 a.m.

2 stops32h 05m

London Heathrow

Sat 25/4

8:00 a.m.-5:04 p.m.

2 stops38h 04m

C$ 1,080

LondonLondon

YXU - LHR

YXULHR

London

Thu 7/5

9:30 a.m.-7:15 a.m.

2 stops16h 45m

London Heathrow

Thu 14/5

2:10 p.m.-11:43 a.m.

2 stops26h 33m

C$ 1,080

LondonLondon

YXU - LHR

YXULHR

London

Tue 26/5

12:20 p.m.-10:25 a.m.

2 stops17h 05m

London Heathrow

Sat 30/5

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

2 stops18h 38m

C$ 1,080

LondonLondon

YXU - LHR

YXULHR

London

Sat 2/5

9:30 a.m.-8:30 a.m.

2 stops18h 00m

London Heathrow

Wed 6/5

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

2 stops14h 23m

C$ 1,099

LondonLondon

YXU - LHR

YXULHR

London

Sun 3/5

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

2 stops13h 35m

London Heathrow

Sun 10/5

4:40 p.m.-8:53 a.m.

2 stops21h 13m

C$ 1,100

LondonLondon

YXU - LHR

YXULHR

London

Thu 16/4

9:25 a.m.-6:45 a.m.

2 stops16h 20m

London Heathrow

Wed 29/4

11:05 a.m.-8:44 a.m.

2 stops26h 39m

C$ 1,100

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/3

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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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

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

Currently, February is the cheapest month in which you can book a flight from London, Ontario to United Kingdom (average of C$ 60). Flying from London, Ontario to United Kingdom in March is currently the most expensive (average of C$ 682). 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 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 23 March 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
10,834 reviews
Check prices

Overall

7.1

Entertainment

6.8

Food

6.3

Boarding

7.3

Crew

7.8

Comfort

7.1

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,834 reviews
Air Canada
7.1
Good
10,834 reviews
Check prices

Overall

7.1

Entertainment

6.8

Food

6.3

Boarding

7.3

Crew

7.8

Comfort

7.1

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

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 13h 25m. Fly via United Airlines, Air Canada, or SWISS to get the fastest option. London, Ontario and United Kingdom are separated by a distance of 5874 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.

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

    Currently, February is the cheapest month in which you can book a flight from London, Ontario to United Kingdom (average of C$ 60). Flying from London, Ontario to United Kingdom in March is currently the most expensive (average of C$ 682). 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 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 23 March 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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