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Cheap flights from London, ON to the United States from C$ 235

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LAX
4 Apr — 11 Apr1
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 5 March 2026.

Tue 7/76:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Thu 30/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 28/2C$ 399
Tue 7/72:20 p.m.
YXU
-
SFO
2 stops10h 35m
WestJet
Wed 29/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 28/2C$ 400
Tue 7/72:40 p.m.
YXU
-
SFO
2 stops10h 15m
WestJet
Fri 31/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 2/3C$ 418
Wed 8/76:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Wed 29/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 28/2C$ 422
Wed 8/48:10 p.m.
YXU
-
SFO
1 stop19h 00m
WestJet
Wed 22/41:00 p.m.
SFO
-
YXU
1 stop14h 35m
WestJet
Deal found 2/3C$ 424
Thu 9/76:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Wed 29/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 2/3C$ 425
Thu 9/76:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Thu 30/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 28/2C$ 428
Fri 29/52:40 p.m.
YXU
-
SFO
2 stops10h 15m
WestJet
Sat 30/56:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 4/3C$ 436
Wed 8/76:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Tue 28/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 2/3C$ 441
Wed 8/49:25 a.m.
YXU
-
SFO
2 stops14h 57m
Air Canada
Wed 22/48:30 a.m.
SFO
-
YXU
1 stop9h 49m
Air Canada
Deal found 2/3C$ 444
Sun 19/45:40 p.m.
YXU
-
TPA
1 stop5h 10m
Air Canada
Wed 22/412:00 p.m.
TPA
-
YXU
2 stops9h 19m
Air Canada
Deal found 2/3C$ 461
Mon 20/49:25 a.m.
YXU
-
TPA
2 stops11h 38m
Air Canada
Wed 22/412:00 p.m.
TPA
-
YXU
2 stops9h 19m
Air Canada
Deal found 2/3C$ 465

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 5 March 2026.

Round-trip from

C$ 399

One-way from

C$ 235

Popular in

December

Cheapest in

March

Average price

C$ 354
WestJet
  • WestJet
  • 7/7-30/7
  • 2 total stops
  • 17h 05m total
  • London to USA
Search Deals
Air Canada
  • Air Canada
  • 8/4
  • 1 total stop
  • 8h 45m total
  • London to USA
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (C$ 155 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 5 March 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

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 7/7

2:40 p.m.-9:55 p.m.

2 stops10h 15m

San Francisco

Thu 30/7

6:05 p.m.-5:20 a.m.

1 stop8h 15m

C$ 418

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 8/7

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

1 stop8h 50m

San Francisco

Wed 29/7

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

1 stop7h 45m

C$ 425

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 8/7

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

1 stop8h 50m

San Francisco

Fri 31/7

6:05 p.m.-5:20 a.m.

1 stop8h 15m

C$ 425

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 7/7

2:40 p.m.-9:55 p.m.

2 stops10h 15m

San Francisco

Wed 29/7

6:05 p.m.-5:20 a.m.

1 stop8h 15m

C$ 429

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 29/5

2:40 p.m.-9:55 p.m.

2 stops10h 15m

San Francisco

Sat 30/5

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

1 stop7h 45m

C$ 436

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 6/7

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

1 stop21h 05m

San Francisco

Thu 9/7

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

1 stop7h 45m

C$ 450

LondonTampa

YXU - TPA

YXUTPA

London

Tue 14/4

9:25 a.m.-9:03 p.m.

2 stops11h 38m

Tampa

Tue 21/4

7:45 a.m.-5:04 p.m.

1 stop9h 19m

C$ 492

LondonOrlando

YXU - MCO

YXUMCO

London

Sun 22/3

5:40 p.m.-11:50 p.m.

1 stop6h 10m

Orlando

Tue 31/3

12:05 p.m.-5:03 p.m.

1 stop4h 58m

C$ 518

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 7/4

9:25 a.m.-12:39 a.m.

2 stops18h 14m

San Francisco

Fri 24/4

10:50 p.m.-9:19 p.m.

2 stops19h 29m

C$ 529

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 8/4

9:25 a.m.-12:39 a.m.

2 stops18h 14m

San Francisco

Mon 20/4

10:50 p.m.-9:19 p.m.

2 stops19h 29m

C$ 529

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/3

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, April is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 89). Flying from London, Ontario to USA in December is currently the most expensive (average of C$ 198). 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 5 March 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
9,388 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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
9,388 reviews
United Airlines
7.4
Good
9,388 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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
3,281 reviews
United Airlines
7.4
Good
9,388 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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
10,776 reviews
United Airlines
7.4
Good
9,388 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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
Flair Airlines
6.0
Okay
265 reviews
United Airlines
7.4
Good
9,388 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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 5h 10m. London, Ontario and USA are separated by a distance of 1677 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 - Newark. You may also consider London - Orlando or London - New York LaGuardia.

  • 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, April is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 89). Flying from London, Ontario to USA in December is currently the most expensive (average of C$ 198). 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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Alternative routes for London to USA

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from London to USA

Discover the top 4 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 5 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 159AverageC$ 186FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 177AverageC$ 564FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 218AverageC$ 375FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 252AverageC$ 687FlexibilityNo 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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