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Cheap flights from London, ON to the United States from C$ 314

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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LAX
27 Jun — 4 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 28 May 2026.

Mon 12/106:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Wed 21/106:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 26/5C$ 491
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 26/5C$ 532
Thu 24/96:10 a.m.
YXU
-
SAN
1 stop11h 00m
WestJet
Mon 28/93:30 p.m.
SAN
-
YXU
1 stop10h 50m
WestJet
Deal found 24/5C$ 547
Mon 9/119:45 a.m.
YXU
-
LGA
1 stop3h 53m
Air Canada
Thu 12/118:45 a.m.
LGA
-
YXU
1 stop6h 21m
Air Canada
Deal found 27/5C$ 610
Thu 8/105:40 a.m.
YXU
-
SFO
1 stop7h 59m
Air Canada
Tue 13/1011:10 a.m.
SFO
-
YXU
2 stops19h 10m
Air Canada
Deal found 26/5C$ 614
Thu 25/63:30 p.m.
YXU
-
SEA
1 stop8h 37m
Air Canada
Wed 1/78:00 a.m.
SEA
-
YXU
1 stop6h 42m
Air Canada
Deal found 25/5C$ 622
Tue 22/910:05 a.m.
YXU
-
SAN
2 stops13h 31m
Air Canada
Sat 26/97:00 a.m.
SAN
-
YXU
2 stops11h 40m
Air Canada
Deal found 27/5C$ 630
Sun 2/86:20 p.m.
YXU
-
EWR
1 stop4h 15m
Air Canada
Sun 9/89:00 a.m.
EWR
-
YXU
1 stop5h 55m
Air Canada
Deal found 26/5C$ 633
Sun 2/85:40 a.m.
YXU
-
LGA
1 stop5h 15m
Air Canada
Sun 9/88:45 a.m.
LGA
-
YXU
1 stop6h 10m
Air Canada
Deal found 26/5C$ 633
Sat 28/113:25 p.m.
YXU
-
FLL
1 stop5h 23m
Air Canada
Mon 7/1210:15 p.m.
FLL
-
YXU
1 stop10h 51m
Air Canada
Deal found 27/5C$ 635
Mon 31/83:30 p.m.
YXU
-
SEA
1 stop8h 37m
Air Canada
Wed 2/98:00 a.m.
SEA
-
YXU
1 stop6h 45m
Air Canada
Deal found 27/5C$ 653
Mon 12/103:30 p.m.
YXU
-
SFO
2 stops22h 47m
Air Canada
Wed 21/1011:35 a.m.
SFO
-
YXU
1 stop7h 05m
Air Canada
Deal found 26/5C$ 655

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 28 May 2026.

Round-trip from

C$ 491

One-way from

C$ 314

Popular in

July

Cheapest in

August

Average price

C$ 702
WestJet
  • WestJet
  • 12/10-21/10
  • 2 total stops
  • 17h 05m total
  • London to USA
Search Deals
Air Canada
  • Air Canada
  • 5/7
  • 1 total stop
  • 6h 19m total
  • London to USA
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 28 May 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$ 535

LondonSan Diego

YXU - SAN

YXUSAN

London

Tue 22/9

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

2 stops13h 31m

San Diego

Sat 26/9

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

2 stops11h 40m

C$ 630

LondonFort Lauderdale

YXU - FLL

YXUFLL

London

Wed 19/8

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

1 stop5h 49m

Fort Lauderdale

Thu 20/8

12:30 p.m.-5:45 p.m.

1 stop5h 15m

C$ 665

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 4/11

3:25 p.m.-8:54 p.m.

1 stop8h 29m

Seattle/Tacoma Intl

Wed 9/12

7:45 a.m.-9:46 p.m.

1 stop11h 01m

C$ 680

LondonSan Diego

YXU - SAN

YXUSAN

London

Tue 22/9

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

1 stop11h 00m

San Diego

Sat 26/9

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

1 stop10h 50m

C$ 686

LondonSan Diego

YXU - SAN

YXUSAN

London

Tue 22/9

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

1 stop11h 00m

San Diego

Sat 26/9

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

1 stop10h 50m

C$ 687

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 12/10

3:30 p.m.-11:17 a.m.

2 stops22h 47m

San Francisco

Wed 21/10

12:15 p.m.-9:20 a.m.

2 stops18h 05m

C$ 688

LondonDallas

YXU - DFW

YXUDFW

London

Sat 26/9

10:05 a.m.-9:34 p.m.

2 stops12h 29m

Dallas/Fort Worth

Mon 5/10

12:25 p.m.-9:40 p.m.

2 stops8h 15m

C$ 691

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 31/8

6:20 p.m.-10:07 a.m.

2 stops18h 47m

Seattle/Tacoma Intl

Wed 2/9

8:00 a.m.-5:45 p.m.

1 stop6h 45m

C$ 695

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 25/6

3:30 p.m.-9:07 p.m.

1 stop8h 37m

Seattle/Tacoma Intl

Wed 1/7

7:20 p.m.-9:20 a.m.

2 stops11h 00m

C$ 701

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
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, August is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 220). Flying from London, Ontario to USA in April is currently the most expensive (average of C$ 462). 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 28 May 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
9,751 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

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
9,751 reviews
United Airlines
7.4
Good
9,751 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

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
3,347 reviews
United Airlines
7.4
Good
9,751 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

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
11,095 reviews
United Airlines
7.4
Good
9,751 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

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 8h 50m. 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 - San Diego. You may also consider London - Newark 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$ 220). Flying from London, Ontario to USA in April is currently the most expensive (average of C$ 462). 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 28 May 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 220AverageC$ 419FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 255AverageC$ 749FlexibilityNo 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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