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Cheap flights from London, ON to the United Kingdom from C$ 325

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 23/1. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LHR
8 Jan — 15 Jan1
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 9 December 2025.

Sun 14/129:25 a.m.YXU - LHR
2 stops18h 55mAir Canada
Wed 7/19:00 a.m.LHR - YXU
2 stops28h 46mAir Canada
Deal found 7/12C$ 1,485
Sun 14/129:25 a.m.YXU - LHR
2 stops18h 55mAir Canada
Tue 6/19:00 a.m.LHR - YXU
2 stops13h 05mAir Canada
Deal found 7/12C$ 1,636
Mon 15/125:40 p.m.YXU - LHR
2 stops21h 55mAir Canada
Wed 7/19:00 a.m.LHR - YXU
2 stops13h 05mAir Canada
Deal found 7/12C$ 1,686
Sun 14/125:40 p.m.YXU - LHR
1 stop9h 50mAir Canada
Thu 1/11:25 p.m.LHR - YXU
2 stops24h 21mAir Canada
Deal found 7/12C$ 1,720
Wed 10/125:40 p.m.YXU - LHR
1 stop9h 50mAir Canada
Wed 7/111:10 a.m.LHR - YXU
1 stop10h 55mAir Canada
Deal found 7/12C$ 1,810
Tue 9/125:40 p.m.YXU - LHR
1 stop9h 50mAir Canada
Wed 7/111:10 a.m.LHR - YXU
1 stop10h 55mAir Canada
Deal found 7/12C$ 1,835
Thu 11/125:40 p.m.YXU - LHR
1 stop9h 50mAir Canada
Wed 7/111:10 a.m.LHR - YXU
1 stop10h 55mAir Canada
Deal found 7/12C$ 1,841
Mon 15/128:10 p.m.YXU - LHR
1 stop35h 40mWestJet
Wed 7/12:50 p.m.LHR - YXU
1 stop20h 44mWestJet
Deal found 7/12C$ 1,897
Mon 15/129:25 a.m.YXU - LHR
2 stops16h 45mAir Canada
Thu 1/11:25 p.m.LHR - YXU
2 stops24h 21mAir Canada
Deal found 7/12C$ 1,925
Wed 10/125:40 p.m.YXU - LHR
1 stop9h 50mAir Canada
Mon 5/16:00 p.m.LHR - YXU
1 stop19h 46mAir Canada
Deal found 7/12C$ 1,961
Sat 13/125:40 p.m.YXU - LHR
1 stop9h 50mLufthansa
Mon 5/16:00 p.m.LHR - YXU
1 stop28h 05mLufthansa
Deal found 7/12C$ 1,985
Sun 28/129:25 a.m.YXU - LCY
2 stops27h 15mLufthansa
Fri 2/19:55 a.m.LCY - YXU
2 stops16h 26mLufthansa
Deal found 7/12C$ 3,709

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 9 December 2025.

Round-trip from

C$ 921

One-way from

C$ 325

Popular in

August

Cheapest in

July

Average price

C$ 1,592
22/1-29/1
  • 22/1-29/1
  • 3 total stops
  • 62h 19m total
  • London to United Kingdom
Search Deals
WestJet
  • WestJet
  • 23/1
  • 1 total stop
  • 24h 20m total
  • London to United Kingdom
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 185 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 90 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 9 December 2025.
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

Thu 22/1

8:10 p.m.-12:50 p.m.

1 stop35h 40m

London Heathrow

Thu 29/1

8:55 a.m.-6:34 a.m.

2 stops26h 39m

C$ 921

LondonLondon

YXU - LHR

YXULHR

London

Thu 22/1

5:40 p.m.-8:35 p.m.

2 stops21h 55m

London Heathrow

Thu 29/1

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

2 stops28h 46m

C$ 934

LondonLondon

YXU - LHR

YXULHR

London

Wed 7/1

5:10 a.m.-7:10 a.m.

2 stops21h 00m

London Heathrow

Wed 14/1

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

2 stops17h 21m

C$ 940

LondonLondon

YXU - LHR

YXULHR

London

Fri 23/1

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

2 stops23h 10m

London Heathrow

Fri 30/1

9:00 a.m.-9:20 p.m.

2 stops17h 20m

C$ 943

LondonLondon

YXU - LGW

YXULGW

London

Wed 21/1

9:50 a.m.-5:50 p.m.

2 stops27h 00m

London Gatwick

Wed 28/1

6:40 p.m.-8:46 a.m.

2 stops43h 06m

C$ 960

LondonLondon

YXU - LHR

YXULHR

London

Tue 20/1

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

1 stop9h 50m

London Heathrow

Tue 27/1

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

2 stops28h 46m

C$ 961

LondonLondon

YXU - LHR

YXULHR

London

Mon 12/1

5:40 p.m.-1:00 p.m.

2 stops14h 20m

London Heathrow

Mon 26/1

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

2 stops15h 30m

C$ 975

LondonLondon

YXU - LHR

YXULHR

London

Mon 12/1

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

1 stop12h 40m

London Heathrow

Mon 26/1

11:10 a.m.-5:05 p.m.

1 stop10h 55m

C$ 978

LondonManchester

YXU - MAN

YXUMAN

London

Thu 22/1

5:40 p.m.-5:55 p.m.

2 stops19h 15m

Manchester

Thu 29/1

6:45 p.m.-9:20 p.m.

2 stops31h 35m

C$ 1,070

LondonLondon

YXU - LGW

YXULGW

London

Thu 22/1

5:40 p.m.-10:30 p.m.

3 stops23h 50m

London Gatwick

Thu 29/1

6:45 a.m.-9:21 p.m.

2 stops19h 36m

C$ 1,124

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 50 results
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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$ 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.

What is the cheapest time of day to fly from YXU to GB?

Find hourly flight availability from London to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 9 December 2025.

A simple way to save on the total cost of your ticket is to fly from London, Ontario to United Kingdom in the evening. If you’re flexible enough to do this you can expect to save up to 38% on your trip compared to booking a flight at noon.

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 9 December 2025.
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
10,515 reviews
Check prices

Comfort

7.1

Overall

7.1

Entertainment

6.8

Food

6.3

Crew

7.8

Boarding

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍
Air Canada
7.1
Good
10,515 reviews
Air Canada
7.1
Good
10,515 reviews
Check prices

Comfort

7.1

Overall

7.1

Entertainment

6.8

Food

6.3

Crew

7.8

Boarding

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍

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 30m. Fly via Air Canada or United Airlines 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 - Edinburgh Turnhouse or London - London City, 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$ 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

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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 9 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 867AverageC$ 1,214FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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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