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Cheap flights from London, ON to the United States from C$ 307

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LAX
22 Jul — 29 Jul1
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 22 June 2026.

Wed 23/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Wed 7/107:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 20/6C$ 463
Wed 19/85:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Wed 16/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 20/6C$ 484
Mon 28/96:10 a.m.
YXU
-
SAN
1 stop11h 00m
WestJet
Tue 29/93:30 p.m.
SAN
-
YXU
1 stop10h 50m
WestJet
Deal found 20/6C$ 495
Wed 5/85:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Wed 12/87:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 21/6C$ 504
Wed 22/75:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Wed 19/87:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 20/6C$ 505
Wed 22/75:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Wed 26/810:30 a.m.
SEA
-
YXU
1 stop15h 50m
WestJet
Deal found 20/6C$ 548
Fri 17/76:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Fri 24/77:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 19/6C$ 559
Thu 16/75:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Thu 23/77:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 17/6C$ 560
Sat 5/95:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Mon 7/97:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 17/6C$ 565
Sat 31/109:45 a.m.
YXU
-
SAN
2 stops11h 49m
Air Canada
Wed 4/116:30 a.m.
SAN
-
YXU
2 stops12h 16m
Air Canada
Deal found 21/6C$ 618
Mon 28/93:30 p.m.
YXU
-
SAN
2 stops22h 28m
United Airlines
Tue 29/91:24 p.m.
SAN
-
YXU
2 stops16h 56m
United Airlines
Deal found 20/6C$ 623
Wed 21/106:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Sat 24/107:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 19/6C$ 627

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 22 June 2026.

Round-trip from

C$ 463

One-way from

C$ 307

Popular in

July

Cheapest in

January

Average price

C$ 692
WestJet
  • WestJet
  • 23/9-7/10
  • 2 total stops
  • 22h 20m total
  • London to USA
Search Deals
WestJet
  • WestJet
  • 4/8
  • 1 total stop
  • 18h 45m total
  • London to USA
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 81 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 22 June 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 Diego

YXU - SAN

YXUSAN

London

Mon 28/9

6:10 a.m.-2:10 p.m.

1 stop11h 00m

San Diego

Tue 29/9

3:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 495

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 17/7

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

1 stop15h 35m

Seattle/Tacoma Intl

Fri 24/7

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

1 stop6h 45m

C$ 559

LondonSan Diego

YXU - SAN

YXUSAN

London

Sat 31/10

9:45 a.m.-6:34 p.m.

2 stops11h 49m

San Diego

Wed 4/11

6:30 a.m.-9:46 p.m.

2 stops12h 16m

C$ 618

LondonSan Diego

YXU - SAN

YXUSAN

London

Mon 28/9

3:30 p.m.-10:58 a.m.

2 stops22h 28m

San Diego

Tue 29/9

1:24 p.m.-9:20 a.m.

2 stops16h 56m

C$ 623

LondonSan Diego

YXU - SAN

YXUSAN

London

Mon 28/9

3:30 p.m.-10:41 p.m.

2 stops10h 11m

San Diego

Tue 29/9

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

2 stops11h 40m

C$ 628

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 21/10

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

1 stop15h 35m

Seattle/Tacoma Intl

Sat 24/10

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

1 stop6h 45m

C$ 628

LondonChicago

YXU - ORD

YXUORD

London

Thu 3/9

8:40 p.m.-4:40 p.m.

1 stop21h 00m

Chicago O'Hare Intl

Sun 6/9

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

1 stop10h 50m

C$ 667

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 21/10

3:30 p.m.-9:04 p.m.

1 stop8h 34m

Seattle/Tacoma Intl

Sat 24/10

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

2 stops13h 00m

C$ 678

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 16/10

3:30 p.m.-9:04 p.m.

1 stop8h 34m

Seattle/Tacoma Intl

Tue 20/10

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

2 stops13h 00m

C$ 682

LondonOrlando

YXU - MCO

YXUMCO

London

Mon 26/10

5:45 a.m.-11:15 a.m.

1 stop5h 30m

Orlando

Fri 30/10

8:00 a.m.-3:06 p.m.

1 stop7h 06m

C$ 689

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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, August is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 225). Flying from London, Ontario to USA in April is currently the most expensive (average of C$ 473). 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 22 June 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
9,874 reviews
Check prices

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,874 reviews
United Airlines
7.4
Good
9,874 reviews
Check prices

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
WestJet
7.2
Good
3,379 reviews
United Airlines
7.4
Good
9,874 reviews
Check prices

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Air Canada
7.1
Good
11,241 reviews
United Airlines
7.4
Good
9,874 reviews
Check prices

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 11h. London, Ontario and USA are separated by a distance of 3331 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 - New York LaGuardia or London - Dallas/Fort Worth.

  • 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, August is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 225). Flying from London, Ontario to USA in April is currently the most expensive (average of C$ 473). 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 22 June 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 225AverageC$ 436FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 261AverageC$ 843FlexibilityNo 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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