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Cheap flights from London, ON to the United States from C$ 256

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 16/10. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LAX
2 Sep — 9 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 3 August 2026.

Thu 3/96:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Thu 17/96:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 31/7C$ 475
Thu 8/106:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Tue 13/106:00 a.m.
SFO
-
YXU
1 stop20h 20m
WestJet
Deal found 31/7C$ 493
Mon 19/106:10 a.m.
YXU
-
LAS
1 stop9h 45m
WestJet
Fri 23/104:30 p.m.
LAS
-
YXU
1 stop9h 50m
WestJet
Deal found 1/8C$ 503
Thu 24/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Mon 28/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 30/7C$ 527
Fri 11/96:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Fri 18/96:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 29/7C$ 527
Mon 24/86:10 a.m.
YXU
-
LAS
2 stops20h 33m
Multiple Airlines
Mon 21/910:58 a.m.
LAS
-
YXU
2 stops15h 22m
Multiple Airlines
Deal found 2/8C$ 532
Mon 14/95:55 p.m.
YXU
-
SFO
1 stop21h 05m
WestJet
Mon 21/96:00 a.m.
SFO
-
YXU
1 stop20h 20m
WestJet
Deal found 31/7C$ 534
Thu 19/113:25 p.m.
YXU
-
SFO
1 stop9h 05m
Air Canada
Tue 24/119:00 a.m.
SFO
-
YXU
2 stops9h 52m
Air Canada
Deal found 31/7C$ 545
Thu 8/105:40 a.m.
YXU
-
SFO
1 stop7h 59m
Air Canada
Tue 13/104:35 p.m.
SFO
-
YXU
2 stops13h 45m
Air Canada
Deal found 31/7C$ 546
Thu 10/95:40 a.m.
YXU
-
SFO
2 stops12h 41m
Air Canada
Mon 14/96:40 a.m.
SFO
-
YXU
2 stops12h 00m
Air Canada
Deal found 30/7C$ 551
Tue 20/106:10 a.m.
YXU
-
LAS
1 stop9h 45m
WestJet
Wed 28/108:00 a.m.
LAS
-
YXU
1 stop8h 15m
WestJet
Deal found 1/8C$ 555
Mon 14/95:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Mon 21/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 31/7C$ 566

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 3 August 2026.

Round-trip from

C$ 475

One-way from

C$ 256

Popular in

August

Cheapest in

January

Average price

C$ 1,019
WestJet
  • WestJet
  • 3/9-17/9
  • 2 total stops
  • 16h 35m total
  • London to USA
Search Deals
WestJet
  • WestJet
  • 16/10
  • 1 total stop
  • 11h 00m total
  • London to USA
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 252 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 39 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 3 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

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/10

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Tue 13/10

6:00 a.m.-5:20 a.m.

1 stop20h 20m

C$ 493

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$ 503

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 11/9

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Fri 18/9

6:00 a.m.-4:45 p.m.

1 stop7h 45m

C$ 527

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 14/9

5:55 p.m.-12:00 p.m.

1 stop21h 05m

San Francisco

Mon 21/9

6:00 a.m.-5:20 a.m.

1 stop20h 20m

C$ 534

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 10/9

10:05 a.m.-3:24 p.m.

1 stop8h 19m

San Francisco

Mon 14/9

10:45 p.m.-9:20 a.m.

1 stop7h 35m

C$ 551

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 11/9

5:40 a.m.-12:34 p.m.

1 stop9h 54m

San Francisco

Fri 18/9

10:45 p.m.-9:20 a.m.

1 stop7h 35m

C$ 551

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$ 566

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$ 579

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 22/9

5:40 a.m.-3:21 p.m.

2 stops12h 41m

San Francisco

Sat 26/9

7:30 p.m.-5:43 p.m.

2 stops19h 13m

C$ 594

LondonSan Diego

YXU - SAN

YXUSAN

London

Tue 15/9

10:05 a.m.-8:36 p.m.

2 stops13h 31m

San Diego

Tue 22/9

7:00 a.m.-9:40 p.m.

2 stops11h 40m

C$ 605

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
3
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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$ 569). Flying from London, Ontario to USA in March is currently the most expensive (average of C$ 946). 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 3 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
10,058 reviews
Check prices

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

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
10,058 reviews
United Airlines
7.4
Good
10,058 reviews
Check prices

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

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
3,424 reviews
United Airlines
7.4
Good
10,058 reviews
Check prices

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

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
11,420 reviews
United Airlines
7.4
Good
10,058 reviews
Check prices

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

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 8h 19m. London, Ontario and USA are separated by a distance of 3508 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 - Orlando.

  • 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$ 569). Flying from London, Ontario to USA in March is currently the most expensive (average of C$ 946). 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 3 August 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 223AverageC$ 447FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 259AverageC$ 764FlexibilityNo 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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