Find flights
When to book
Airlines
FAQs

Cheap flights from London, ON to the United Kingdom from C$ 535

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 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LHR
18 Mar — 25 Mar1
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 16 February 2026.

Sun 22/29:25 a.m.
YXU
-
LHR
2 stops20h 25m
United Airlines
Thu 26/29:10 a.m.
LHR
-
YXU
2 stops17h 11m
United Airlines
Deal found 14/2C$ 982
Wed 1/49:40 a.m.
YXU
-
LHR
2 stops16h 15m
United Airlines
Wed 8/48:00 a.m.
LHR
-
YXU
2 stops18h 18m
United Airlines
Deal found 15/2C$ 1,005
Sun 6/99:30 a.m.
YXU
-
LHR
2 stops16h 25m
United Airlines
Mon 21/94:40 p.m.
LHR
-
YXU
2 stops21h 15m
United Airlines
Deal found 12/2C$ 1,009
Tue 31/39:40 a.m.
YXU
-
LHR
2 stops15h 50m
Multiple Airlines
Tue 7/47:25 a.m.
LHR
-
YXU
2 stops14h 38m
Multiple Airlines
Deal found 14/2C$ 1,061
Thu 12/35:10 a.m.
YXU
-
LHR
2 stops12h 10m
United Airlines
Thu 19/39:10 a.m.
LHR
-
YXU
2 stops16h 11m
United Airlines
Deal found 12/2C$ 1,062
Wed 9/96:20 p.m.
YXU
-
LHR
1 stop12h 30m
Air Canada
Thu 24/96:00 a.m.
LHR
-
YXU
2 stops16h 45m
Air Canada
Deal found 12/2C$ 1,085
Wed 1/45:10 a.m.
YXU
-
LHR
2 stops22h 25m
Multiple Airlines
Wed 8/47:25 a.m.
LHR
-
YXU
2 stops14h 38m
Multiple Airlines
Deal found 15/2C$ 1,086
Sun 1/35:40 p.m.
YXU
-
LGW
3 stops24h 40m
Multiple Airlines
Wed 4/37:50 p.m.
LGW
-
YXU
3 stops30h 31m
Multiple Airlines
Deal found 13/2C$ 1,189
Sun 29/35:40 p.m.
YXU
-
LGW
2 stops19h 10m
Multiple Airlines
Sun 5/49:25 a.m.
LGW
-
YXU
2 stops16h 53m
Multiple Airlines
Deal found 12/2C$ 1,195
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 14/2C$ 1,276
Sun 29/39:40 a.m.
YXU
-
STN
2 stops23h 50m
Multiple Airlines
Sun 5/46:35 a.m.
STN
-
YXU
2 stops15h 28m
Multiple Airlines
Deal found 12/2C$ 1,330
Tue 31/35:40 p.m.
YXU
-
STN
2 stops20h 35m
Multiple Airlines
Tue 7/46:20 a.m.
STN
-
YXU
3 stops19h 58m
Multiple Airlines
Deal found 14/2C$ 1,444

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 16 February 2026.

Round-trip from

C$ 1,005

One-way from

C$ 535

Popular in

August

Cheapest in

July

Average price

C$ 914
United Airlines
  • United Airlines
  • 1/4-8/4
  • 4 total stops
  • 34h 33m total
  • London to United Kingdom
Search Deals
15/6
  • 15/6
  • 2 total stops
  • 34h 10m total
  • London to United Kingdom
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 209 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 89 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 16 February 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 1/4

9:40 a.m.-6:55 a.m.

2 stops16h 15m

London Heathrow

Wed 8/4

8:00 a.m.-9:18 p.m.

2 stops18h 18m

C$ 1,005

LondonLondon

YXU - LHR

YXULHR

London

Tue 31/3

9:40 a.m.-6:55 a.m.

2 stops16h 15m

London Heathrow

Tue 7/4

8:00 a.m.-9:18 p.m.

2 stops18h 18m

C$ 1,005

LondonLondon

YXU - LHR

YXULHR

London

Wed 1/4

5:40 p.m.-10:40 a.m.

2 stops12h 00m

London Heathrow

Wed 15/4

12:00 p.m.-9:18 p.m.

2 stops14h 18m

C$ 1,005

LondonLondon

YXU - LHR

YXULHR

London

Tue 31/3

9:40 a.m.-6:30 a.m.

2 stops15h 50m

London Heathrow

Tue 7/4

7:25 a.m.-5:03 p.m.

2 stops14h 38m

C$ 1,061

LondonLondon

YXU - LHR

YXULHR

London

Thu 12/3

5:10 a.m.-9:20 p.m.

2 stops12h 10m

London Heathrow

Thu 19/3

9:10 a.m.-9:21 p.m.

2 stops16h 11m

C$ 1,062

LondonLondon

YXU - LHR

YXULHR

London

Wed 1/4

9:40 a.m.-6:35 a.m.

1 stop15h 55m

London Heathrow

Wed 8/4

7:25 a.m.-5:03 p.m.

2 stops14h 38m

C$ 1,093

LondonLondon

YXU - LHR

YXULHR

London

Tue 31/3

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

1 stop10h 55m

London Heathrow

Tue 7/4

2:10 p.m.-8:43 a.m.

1 stop23h 33m

C$ 1,097

LondonLondon

YXU - LHR

YXULHR

London

Wed 1/4

9:40 a.m.-6:35 a.m.

1 stop15h 55m

London Heathrow

Wed 8/4

5:40 p.m.-8:43 a.m.

1 stop20h 03m

C$ 1,101

LondonLondon

YXU - LGW

YXULGW

London

Sun 1/3

5:40 p.m.-11:20 p.m.

3 stops24h 40m

London Gatwick

Wed 4/3

7:50 p.m.-9:21 p.m.

3 stops30h 31m

C$ 1,189

LondonLondon

YXU - LGW

YXULGW

London

Sun 29/3

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

2 stops19h 10m

London Gatwick

Sun 5/4

9:25 a.m.-9:18 p.m.

2 stops16h 53m

C$ 1,195

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/2

Showing 1-10 of 60 results
1
2
3
...
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, May is the cheapest month in which you can book a flight from London, Ontario to United Kingdom (average of C$ 99). Flying from London, Ontario to United Kingdom in January is currently the most expensive (average of C$ 674). 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 16 February 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
10,724 reviews
Check prices

Crew

7.8

Comfort

7.1

Food

6.3

Boarding

7.3

Overall

7.1

Entertainment

6.8

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
10,724 reviews
Air Canada
7.1
Good
10,724 reviews
Check prices

Crew

7.8

Comfort

7.1

Food

6.3

Boarding

7.3

Overall

7.1

Entertainment

6.8

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 16h 15m. Fly via United Airlines or Air Canada 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 - 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, May is the cheapest month in which you can book a flight from London, Ontario to United Kingdom (average of C$ 99). Flying from London, Ontario to United Kingdom in January is currently the most expensive (average of C$ 674). 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.
Pearson Intl to Heathrow flights
Pierre Elliott Trudeau Intl to Charles de Gaulle flights
Pearson Intl to Gatwick flights
Pearson Intl to Charles de Gaulle flights
Pierre Elliott Trudeau Intl to Lisbon flights
Pearson Intl to Lisbon flights
Pearson Intl to Leonardo da Vinci/Fiumicino flights
Pearson Intl to Istanbul flights
Pierre Elliott Trudeau Intl to Orly flights
Pearson Intl to Dublin flights
Pierre Elliott Trudeau Intl to Leonardo da Vinci/Fiumicino flights
Pierre Elliott Trudeau Intl to Heathrow flights
Pierre Elliott Trudeau Intl to Athens flights
Pierre Elliott Trudeau Intl to Barcelona-El Prat flights
Pearson Intl to London City flights
Pierre Elliott Trudeau Intl to Istanbul flights
Pearson Intl to Stansted flights
Pearson Intl to Athens flights
Pearson Intl to Amsterdam flights
Pearson Intl to Barcelona-El Prat flights
Toronto Island to Heathrow flights
Pearson Intl to Frankfurt flights
Pearson Intl to Orly flights
Pierre Elliott Trudeau Intl to Madrid flights
Pearson Intl to Luton flights
Pierre Elliott Trudeau Intl to Málaga flights
Pierre Elliott Trudeau Intl to Beauvais-Tille flights
Pierre Elliott Trudeau Intl to Bruxelles-National flights
Pierre Elliott Trudeau Intl to Amsterdam flights
Pierre Elliott Trudeau Intl to Geneva flights
Toronto Island to Gatwick flights
Toronto Island to Charles de Gaulle flights
Toronto Island to Lisbon flights
Pierre Elliott Trudeau Intl to Gatwick flights
Pearson Intl to Madrid flights
Pierre Elliott Trudeau Intl to Malpensa flights
Toronto Island to Leonardo da Vinci/Fiumicino flights
Pearson Intl to Vicenza flights
Pierre Elliott Trudeau Intl to Lyon flights
Pearson Intl to Frederic Chopin flights
Pearson Intl to Edinburgh flights
Pierre Elliott Trudeau Intl to Frankfurt flights
Pierre Elliott Trudeau Intl to London City flights
Pierre Elliott Trudeau Intl to Nice flights
Pearson Intl to Sabiha Gokcen flights
Pierre Elliott Trudeau Intl to Stansted flights
Pierre Elliott Trudeau Intl to Sabiha Gokcen flights
Pearson Intl to Ponta Delgada flights
Pierre Elliott Trudeau Intl to Marseille flights
Pierre Elliott Trudeau Intl to Vicenza 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 16 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 853AverageC$ 1,207FlexibilityNo 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.