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Cheap flights from London, ON to the United States from C$ 267

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LAX
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to USA

Enter your travel dates to find the best prices.

Cheapest flights from London to USA
Explore the most affordable flight options available from London to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 August 2026.

Mon 19/106:10 a.m. -
1 stop9h 45m
Fri 23/104:30 p.m. -
1 stop9h 50m
Deal found 1/8C$ 504
Thu 24/96:10 a.m. -
1 stop15h 35m
Mon 28/97:35 p.m. -
1 stop6h 45m
Deal found 30/7C$ 528
Mon 24/86:10 a.m. -
2 stops20h 33m
Mon 21/910:58 a.m. -
2 stops15h 22m
Deal found 2/8C$ 533
Sun 18/106:10 a.m. -
1 stop18h 30m
Thu 22/104:30 p.m. -
1 stop9h 50m
Deal found 3/8C$ 549
Mon 14/95:55 p.m. -
1 stop18h 45m
Mon 21/97:35 p.m. -
1 stop6h 45m
Deal found 31/7C$ 567
Fri 18/96:10 a.m. -
1 stop18h 30m
Fri 25/94:30 p.m. -
1 stop9h 50m
Deal found 3/8C$ 569
Tue 20/106:10 a.m. -
1 stop9h 45m
Wed 28/101:10 p.m. -
2 stops27h 05m
Deal found 1/8C$ 576
Wed 23/96:10 a.m. -
1 stop15h 35m
Mon 28/97:35 p.m. -
1 stop6h 45m
Deal found 30/7C$ 580
Mon 14/96:10 a.m. -
2 stops12h 35m
Mon 21/94:30 p.m. -
1 stop9h 50m
Deal found 2/8C$ 606
Wed 23/96:10 a.m. -
2 stops18h 50m
Mon 28/97:35 p.m. -
1 stop6h 45m
Deal found 30/7C$ 619
Fri 14/82:40 p.m. -
2 stops22h 00m
Sat 22/87:00 a.m. -
1 stop6h 45m
Deal found 30/7C$ 640
Mon 7/96:10 a.m. -
1 stop9h 45m
Mon 14/94:30 p.m. -
1 stop9h 50m
Deal found 2/8C$ 649

Find flight deals from London to USA

Keep the following information in mind while searching for London to USA flight deals. Data was last updated 4 August 2026.

Round-trip from

C$ 504

One-way from

C$ 267

Popular in

August

Cheapest in

January

Average price

C$ 1,021
WestJet
  • WestJet
  • 19/10-23/10
  • 2 total stops
  • 19h 35m total
  • London to USA
Search Deals
8/9
  • 8/9
  • 2 total stops
  • 20h 12m total
  • London to USA
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 253 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to USA 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 4 August 2026.
Use the filters below to find and compare flights from London to the United States that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonLas Vegas

YXU - LAS

YXULAS

London

Mon 19/10

6:10 a.m.-12:55 p.m.

1 stop9h 45m

Las Vegas Harry Reid Intl

Fri 23/10

4:30 p.m.-5:20 a.m.

1 stop9h 50m

C$ 504

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 14/9

5:55 p.m.-9:40 a.m.

1 stop18h 45m

Seattle/Tacoma Intl

Mon 21/9

7:35 p.m.-5:20 a.m.

1 stop6h 45m

C$ 567

LondonLas Vegas

YXU - LAS

YXULAS

London

Fri 18/9

6:10 a.m.-9:40 p.m.

1 stop18h 30m

Las Vegas Harry Reid Intl

Fri 25/9

4:30 p.m.-5:20 a.m.

1 stop9h 50m

C$ 569

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 23/9

6:10 a.m.-6:45 p.m.

1 stop15h 35m

Seattle/Tacoma Intl

Mon 28/9

7:35 p.m.-5:20 a.m.

1 stop6h 45m

C$ 580

LondonLas Vegas

YXU - LAS

YXULAS

London

Mon 24/8

6:10 a.m.-11:47 p.m.

3 stops20h 37m

Las Vegas Harry Reid Intl

Mon 21/9

10:58 a.m.-5:20 a.m.

2 stops15h 22m

C$ 595

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 17/9

5:55 p.m.-9:40 a.m.

1 stop18h 45m

Seattle/Tacoma Intl

Sat 19/9

7:35 p.m.-5:20 a.m.

1 stop6h 45m

C$ 675

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 17/9

3:30 p.m.-10:47 p.m.

2 stops10h 17m

Seattle/Tacoma Intl

Sat 19/9

8:00 a.m.-5:43 p.m.

1 stop6h 43m

C$ 715

LondonLas Vegas

YXU - LAS

YXULAS

London

Sun 11/10

6:10 a.m.-12:55 p.m.

1 stop9h 45m

Las Vegas Harry Reid Intl

Thu 15/10

6:10 p.m.-5:20 a.m.

1 stop8h 10m

C$ 716

LondonFort Lauderdale

YXU - FLL

YXUFLL

London

Wed 16/9

5:40 a.m.-11:29 a.m.

1 stop5h 49m

Fort Lauderdale

Wed 23/9

12:30 p.m.-5:43 p.m.

1 stop5h 13m

C$ 727

LondonChicago

YXU - ORD

YXUORD

London

Fri 11/9

6:10 a.m.-4:40 p.m.

1 stop11h 30m

Chicago O'Hare Intl

Fri 18/9

5:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 729

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/8

Showing 1-10 of 60 resultsSorted by cheapest first
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2
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6

Best time to book a flight from London to USA

Have a flexible travel schedule? Discover the best time to fly to USA 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 States

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

Currently, September is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 570). Flying from London, Ontario to USA in March is currently the most expensive (average of C$ 980). 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 USA

Get insights into the airlines that provide service to USA. 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 USA. Reviews last updated 4 August 2026.
Check out reviews from past customers who have flown with United Airlines,WestJet, andAir Canada from London to the United States to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,061 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
10,061 reviews
United Airlines
7.4
Good
10,061 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,426 reviews
United Airlines
7.4
Good
10,061 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
11,427 reviews
United Airlines
7.4
Good
10,061 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from London to USA. 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 States?

    Located just 8.6 km from the city centre, London (YXU) is the airport most travellers will use when flying to United States from London.

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

    Departing from London, Ontario to USA will take you 9h 16m. London, Ontario and USA are separated by a distance of 1622 km. This flight may include one or multiple stops.

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

    The most popular route from London, Ontario to USA is London - Miami. You may also consider London - Newark or London - New York John F Kennedy Intl.

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

    Yes. In addition to deals on London to USA flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from London to USA?

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

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

    Yes. Cheapflights offers flight deals from London to USA 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 USA?

    Currently, September is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 570). Flying from London, Ontario to USA in March is currently the most expensive (average of C$ 980). 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

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Top 2 airlines flying from London to USA

Discover the top 2 airlines that operate flights from London to USA. 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 4 August 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 224AverageC$ 448FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 259AverageC$ 766FlexibilityNo 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 USA?

Cheapflights helps you search for flights from London to USA via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from London to USA by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to USA flexibly with Cheapflights today.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to USA from London today and book when prices fit your budget.

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