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Cheap flights from the United Kingdom to London, Ontario from £261

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YXU
14 Mar — 21 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to London

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to London
Explore the most affordable flight options available from United Kingdom to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 February 2026.

Tue 10/306:00
LHR
-
YXU
2 stops15h 05m
Air Canada
Tue 17/317:40
YXU
-
LHR
1 stop10h 50m
Air Canada
Deal found 9/2£532
Mon 9/309:00
LHR
-
YXU
2 stops16h 21m
Air Canada
Mon 16/309:40
YXU
-
LHR
2 stops17h 30m
Air Canada
Deal found 9/2£534
Tue 10/309:00
LHR
-
YXU
2 stops16h 21m
Multiple Airlines
Tue 17/317:40
YXU
-
LHR
2 stops35h 40m
Multiple Airlines
Deal found 10/2£541
Mon 23/219:25
LHR
-
YXU
2 stops26h 40m
Multiple Airlines
Mon 2/317:40
YXU
-
LHR
2 stops14h 10m
Multiple Airlines
Deal found 9/2£545
Mon 9/306:00
LHR
-
YXU
2 stops19h 21m
Multiple Airlines
Mon 16/317:40
YXU
-
LHR
2 stops22h 55m
Multiple Airlines
Deal found 9/2£555
Tue 10/318:40
LGW
-
YXU
2 stops30h 41m
SWISS
Tue 17/317:40
YXU
-
LGW
2 stops20h 10m
SWISS
Deal found 9/2£556
Mon 23/219:25
LHR
-
YXU
2 stops26h 40m
Air Canada
Mon 2/317:40
YXU
-
LHR
1 stop9h 50m
Air Canada
Deal found 9/2£556
Tue 10/318:40
LGW
-
YXU
2 stops42h 06m
Multiple Airlines
Tue 17/309:40
YXU
-
LGW
2 stops28h 10m
Multiple Airlines
Deal found 11/2£556
Thu 19/306:00
LHR
-
YXU
2 stops19h 21m
Air Canada
Sun 29/317:40
YXU
-
LHR
2 stops22h 20m
Air Canada
Deal found 11/2£562
Tue 10/309:15
LCY
-
YXU
2 stops16h 06m
SWISS
Tue 17/317:40
YXU
-
LCY
2 stops15h 15m
SWISS
Deal found 9/2£595
Mon 9/309:15
LCY
-
YXU
2 stops16h 06m
Multiple Airlines
Mon 16/317:40
YXU
-
LCY
2 stops20h 00m
Multiple Airlines
Deal found 9/2£619
Mon 23/209:50
LCY
-
YXU
2 stops16h 31m
Multiple Airlines
Mon 2/317:40
YXU
-
LCY
2 stops14h 15m
Multiple Airlines
Deal found 9/2£632

Find flight deals from United Kingdom to London

Keep the following information in mind while searching for United Kingdom to London flight deals. Data was last updated 12 February 2026.

Round-trip from

£532

One-way from

£261

Popular in

August

Cheapest in

January

Average price

£680
Air Canada
  • Air Canada
  • 10/3-17/3
  • 3 total stops
  • 25h 55m total
  • United Kingdom to London
Search Deals
29/4
  • 29/4
  • 3 total stops
  • 50h 35m total
  • United Kingdom to London
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£23 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom to London 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 858,174 searches. Data last updated 12 February 2026.
Use the filters below to find and compare flights from the United Kingdom to London that are best for you.

Fly from

United Kingdom

Fly to

London

Route

Depart

Return

Price

LondonLondon

LHR - YXU

LHRYXU

London Heathrow

Mon 9/3

09:00-21:21

2 stops16h 21m

London

Mon 16/3

09:40-07:10

2 stops17h 30m

£534

LondonLondon

LHR - YXU

LHRYXU

London Heathrow

Tue 10/3

09:00-21:21

2 stops16h 21m

London

Tue 17/3

17:40-09:20

2 stops35h 40m

£541

LondonLondon

LHR - YXU

LHRYXU

London Heathrow

Mon 9/3

06:00-21:21

2 stops19h 21m

London

Mon 16/3

17:40-20:35

2 stops22h 55m

£555

LondonLondon

LHR - YXU

LHRYXU

London Heathrow

Mon 23/2

19:25-17:05

2 stops26h 40m

London

Mon 2/3

17:40-08:30

1 stop9h 50m

£556

LondonLondon

LGW - YXU

LGWYXU

London Gatwick

Tue 10/3

18:40-08:46

2 stops42h 06m

London

Tue 17/3

09:40-17:50

2 stops28h 10m

£556

LondonLondon

LHR - YXU

LHRYXU

London Heathrow

Tue 10/3

13:00-21:21

1 stop12h 21m

London

Tue 17/3

09:40-06:30

1 stop16h 50m

£559

LondonLondon

LHR - YXU

LHRYXU

London Heathrow

Thu 19/3

06:00-21:21

2 stops19h 21m

London

Sun 29/3

17:40-21:00

2 stops22h 20m

£562

LondonLondon

LGW - YXU

LGWYXU

London Gatwick

Tue 10/3

18:40-21:21

2 stops30h 41m

London

Tue 17/3

17:40-17:50

2 stops20h 10m

£564

LondonLondon

LHR - YXU

LHRYXU

London Heathrow

Thu 19/3

11:10-08:46

1 stop25h 36m

London

Sun 29/3

09:40-06:35

1 stop15h 55m

£584

LondonLondon

LCY - YXU

LCYYXU

London City

Tue 10/3

09:50-21:21

2 stops15h 31m

London

Tue 17/3

17:40-17:35

2 stops19h 55m

£595

Flights are sorted by cheapest return flights first.

Deals found on 11/2

Showing 1-10 of 55 results
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Best time to book a flight from United Kingdom to London

Have a flexible travel schedule? Discover the best time to fly to London from United Kingdom with our price prediction graph.
Estimated return 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 the United Kingdom to London

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

Currently, August is the cheapest month in which you can book a flight from United Kingdom to London, Ontario (average of £58). Flying from United Kingdom to London, Ontario in December is currently the most expensive (average of £360). 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 London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 12 February 2026.
Read reviews from past customers who have flown with Air Canada from the United Kingdom to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,712 reviews
Check prices

Overall

7.1

Comfort

7.1

Food

6.3

Boarding

7.3

Entertainment

6.8

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.
Air Canada
7.1
Good
10,712 reviews
Air Canada
7.1
Good
10,712 reviews
Check prices

Overall

7.1

Comfort

7.1

Food

6.3

Boarding

7.3

Entertainment

6.8

Crew

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.

Related info for your journey

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

    Located just 5.3 mi from the city center, London (YXU) is the airport most travelers will use when flying to London from United Kingdom.

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

    There are many flights that can get you from United Kingdom to London, Ontario in 15h 31m. Fly via Air Canada, SWISS, or Lufthansa to get the fastest option. Airlines will cover a distance of 3650 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    Most travelers choose London Heathrow - London, London Gatwick - London or London Stansted - London when deciding on the best route from United Kingdom to London, Ontario.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from United Kingdom to London, Ontario (average of £58). Flying from United Kingdom to London, Ontario in December is currently the most expensive (average of £360). 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 United Kingdom to London

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

Discover the top airline that operate flights from United Kingdom to London. 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 858,174 searches. Data last updated 12 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£480Average£725FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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

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

Deals for United Kingdom to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from United Kingdom to London for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from United Kingdom to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from United Kingdom to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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