Find flights
When to book
Airlines
FAQs

Cheap flights from London, ON to the United Kingdom from C$ 561

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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LHR
20 Feb — 27 Feb1
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 21 January 2026.

Wed 18/29:25 a.m.
YXU
-
LHR
2 stops18h 55m
Multiple Airlines
Wed 25/26:35 a.m.
LHR
-
YXU
2 stops15h 30m
Multiple Airlines
Deal found 21/1C$ 846
Fri 6/39:25 a.m.
YXU
-
LHR
1 stop20h 55m
Air Canada
Fri 13/39:00 a.m.
LHR
-
YXU
2 stops16h 21m
Air Canada
Deal found 20/1C$ 857
Wed 18/29:25 a.m.
YXU
-
LHR
1 stop18h 05m
Air Canada
Wed 25/29:00 a.m.
LHR
-
YXU
2 stops17h 21m
Air Canada
Deal found 21/1C$ 861
Wed 15/45:40 p.m.
YXU
-
LHR
1 stop13h 10m
Air Canada
Wed 29/48:40 a.m.
LHR
-
YXU
2 stops17h 38m
Air Canada
Deal found 18/1C$ 870
Mon 23/25:10 a.m.
YXU
-
LHR
1 stop20h 20m
Air Canada
Fri 27/29:00 a.m.
LHR
-
YXU
2 stops37h 05m
Air Canada
Deal found 18/1C$ 872
Sat 7/39:25 a.m.
YXU
-
LHR
2 stops30h 10m
Air Canada
Sat 14/36:00 a.m.
LHR
-
YXU
2 stops19h 21m
Air Canada
Deal found 21/1C$ 874
Tue 14/45:40 p.m.
YXU
-
LHR
1 stop10h 55m
Multiple Airlines
Tue 28/47:25 a.m.
LHR
-
YXU
2 stops14h 38m
Multiple Airlines
Deal found 18/1C$ 877
Thu 5/35:10 a.m.
YXU
-
LGW
2 stops31h 40m
Multiple Airlines
Thu 12/36:40 p.m.
LGW
-
YXU
2 stops50h 25m
Multiple Airlines
Deal found 19/1C$ 888
Sat 7/35:40 p.m.
YXU
-
LGW
2 stops19h 10m
SWISS
Sat 14/36:40 p.m.
LGW
-
YXU
2 stops30h 41m
SWISS
Deal found 21/1C$ 921
Fri 6/35:40 p.m.
YXU
-
EDI
2 stops37h 40m
Multiple Airlines
Fri 13/38:10 a.m.
EDI
-
YXU
2 stops17h 11m
Multiple Airlines
Deal found 20/1C$ 1,121
Mon 14/99:55 a.m.
YXU
-
EDI
1 stop16h 25m
Air Canada
Sat 3/109:00 a.m.
EDI
-
YXU
1 stop17h 27m
Air Canada
Deal found 20/1C$ 1,127
Sun 5/45:10 a.m.
YXU
-
EDI
2 stops24h 25m
United Airlines
Thu 9/412:30 p.m.
EDI
-
YXU
2 stops13h 48m
United Airlines
Deal found 19/1C$ 1,136

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 21 January 2026.

Round-trip from

C$ 846

One-way from

C$ 561

Popular in

August

Cheapest in

July

Average price

C$ 1,125
Lufthansa
  • Lufthansa
  • 18/2-25/2
  • 4 total stops
  • 34h 25m total
  • London to United Kingdom
Search Deals
Air Canada
  • Air Canada
  • 5/3
  • 1 total stop
  • 12h 40m total
  • London to United Kingdom
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 230 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 January 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 21 January 2026.
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 18/2

9:25 a.m.-9:20 a.m.

2 stops18h 55m

London Heathrow

Wed 25/2

6:35 a.m.-5:05 p.m.

2 stops15h 30m

C$ 846

LondonLondon

YXU - LHR

YXULHR

London

Fri 6/3

9:25 a.m.-11:20 a.m.

1 stop20h 55m

London Heathrow

Fri 13/3

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

2 stops16h 21m

C$ 857

LondonLondon

YXU - LHR

YXULHR

London

Wed 18/2

9:25 a.m.-8:30 a.m.

1 stop18h 05m

London Heathrow

Wed 25/2

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

2 stops17h 21m

C$ 861

LondonLondon

YXU - LHR

YXULHR

London

Wed 15/4

9:25 a.m.-8:35 a.m.

2 stops18h 10m

London Heathrow

Wed 29/4

8:40 a.m.-8:43 a.m.

2 stops29h 03m

C$ 871

LondonLondon

YXU - LHR

YXULHR

London

Sat 7/3

9:25 a.m.-8:35 p.m.

2 stops30h 10m

London Heathrow

Sat 14/3

6:00 a.m.-9:21 p.m.

2 stops19h 21m

C$ 874

LondonLondon

YXU - LHR

YXULHR

London

Mon 23/2

5:10 a.m.-8:30 a.m.

1 stop22h 20m

London Heathrow

Fri 27/2

9:00 a.m.-8:46 a.m.

2 stops28h 46m

C$ 875

LondonLondon

YXU - LGW

YXULGW

London

Thu 5/3

5:10 a.m.-5:50 p.m.

2 stops31h 40m

London Gatwick

Thu 12/3

6:40 p.m.-5:05 p.m.

2 stops50h 25m

C$ 888

LondonLondon

YXU - LHR

YXULHR

London

Fri 6/3

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

1 stop9h 50m

London Heathrow

Fri 13/3

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

1 stop12h 21m

C$ 895

LondonLondon

YXU - LHR

YXULHR

London

Wed 15/4

5:40 p.m.-9:35 a.m.

1 stop10h 55m

London Heathrow

Mon 27/4

2:10 p.m.-9:18 p.m.

1 stop12h 08m

C$ 895

LondonLondon

YXU - LGW

YXULGW

London

Sat 7/3

5:40 p.m.-5:50 p.m.

2 stops19h 10m

London Gatwick

Sat 14/3

6:40 p.m.-9:21 p.m.

2 stops30h 41m

C$ 921

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/1

Showing 1-10 of 47 results
1
2
3
...
5

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, May is the cheapest month in which you can book a flight from London, Ontario to United Kingdom (average of C$ 105). Flying from London, Ontario to United Kingdom in November is currently the most expensive (average of C$ 672). 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 21 January 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
10,646 reviews
Check prices

Crew

7.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Sugith,Jan 2026

YYZ - YSB

8 am flight cancelled at 2 am. Rebooked next day. Had to pay to rebook myself on Porter to leave same day.
Air Canada
7.1
Good
10,646 reviews
Air Canada
7.1
Good
10,646 reviews
Check prices

Crew

7.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Sugith,Jan 2026

YYZ - YSB

8 am flight cancelled at 2 am. Rebooked next day. Had to pay to rebook myself on Porter to leave same day.

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 10m. Fly via Air Canada, SWISS, or United Airlines to get the fastest option. London, Ontario and United Kingdom are separated by a distance of 5876 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 Gatwick or London - Edinburgh Turnhouse, 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, May is the cheapest month in which you can book a flight from London, Ontario to United Kingdom (average of C$ 105). Flying from London, Ontario to United Kingdom in November is currently the most expensive (average of C$ 672). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
Pierre Elliott Trudeau Intl to Charles de Gaulle flights
Pearson Intl to Heathrow flights
Pearson Intl to Gatwick flights
Pierre Elliott Trudeau Intl to Lisbon flights
Pearson Intl to Lisbon flights
Pearson Intl to Charles de Gaulle flights
Pierre Elliott Trudeau Intl to Athens flights
Pearson Intl to Istanbul flights
Pearson Intl to Leonardo da Vinci/Fiumicino flights
Pierre Elliott Trudeau Intl to Leonardo da Vinci/Fiumicino flights
Pierre Elliott Trudeau Intl to Orly flights
Pearson Intl to Athens flights
Pierre Elliott Trudeau Intl to Istanbul flights
Pearson Intl to Dublin flights
Pierre Elliott Trudeau Intl to Heathrow flights
Pearson Intl to London City flights
Pierre Elliott Trudeau Intl to Barcelona-El Prat flights
Toronto Island to Heathrow flights
Pearson Intl to Stansted flights
Pearson Intl to Amsterdam flights
Pearson Intl to Barcelona-El Prat flights
Pierre Elliott Trudeau Intl to Málaga flights
Pearson Intl to Frankfurt flights
Pearson Intl to Orly flights
Pearson Intl to Luton flights
Toronto Island to Charles de Gaulle flights
Toronto Island to Lisbon flights
Pierre Elliott Trudeau Intl to Beauvais-Tille flights
Pearson Intl to Frederic Chopin flights
Pierre Elliott Trudeau Intl to Gatwick flights
Pierre Elliott Trudeau Intl to Amsterdam flights
Pierre Elliott Trudeau Intl to Madrid flights
Pierre Elliott Trudeau Intl to Malpensa flights
Pearson Intl to Madrid flights
Pierre Elliott Trudeau Intl to London City flights
Pearson Intl to Zurich flights
Pearson Intl to Edinburgh flights
Pierre Elliott Trudeau Intl to Sabiha Gokcen flights
Pearson Intl to Sabiha Gokcen flights
Pearson Intl to Ponta Delgada flights
Toronto Island to Leonardo da Vinci/Fiumicino flights
Pierre Elliott Trudeau Intl to Bruxelles-National flights
Pierre Elliott Trudeau Intl to Frankfurt flights
Toronto Island to Gatwick flights
Pierre Elliott Trudeau Intl to Stansted flights
Pierre Elliott Trudeau Intl to Vicenza flights
Pierre Elliott Trudeau Intl to Geneva flights
Pearson Intl to Vicenza flights
Pierre Elliott Trudeau Intl to Lyon flights
Ottawa to Charles de Gaulle flights

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 21 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 854AverageC$ 1,213FlexibilityNo 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.