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Cheap flights from the United States to London, ON from C$ 142

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
31 May — 7 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from USA to London

Enter your travel dates to find the best prices.

Cheapest flights from USA to London
Explore the most affordable flight options available from USA to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 May 2026.

Mon 12/106:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Tue 20/106:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 29/4C$ 323
Fri 10/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Tue 14/72:40 p.m.
YXU
-
SFO
2 stops10h 15m
WestJet
Deal found 26/4C$ 439
Sun 5/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Thu 23/76:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 27/4C$ 442
Wed 5/86:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Tue 11/88:40 p.m.
YXU
-
SFO
1 stop28h 15m
WestJet
Deal found 30/4C$ 445
Mon 24/86:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Wed 26/86:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 28/4C$ 486
Mon 24/84:30 p.m.
SFO
-
YXU
2 stops13h 50m
Air Canada
Wed 26/810:05 a.m.
YXU
-
SFO
1 stop8h 22m
Air Canada
Deal found 29/4C$ 516
Thu 21/510:01 p.m.
SFO
-
YXU
2 stops28h 19m
Multiple Airlines
Tue 26/56:10 a.m.
YXU
-
SFO
1 stop8h 50m
Multiple Airlines
Deal found 28/4C$ 536
Sat 23/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
WestJet
Tue 26/56:10 a.m.
YXU
-
ORD
1 stop11h 30m
WestJet
Deal found 30/4C$ 580
Mon 25/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
WestJet
Thu 28/55:55 p.m.
YXU
-
ORD
1 stop23h 45m
WestJet
Deal found 30/4C$ 629
Sat 13/69:55 a.m.
ORD
-
YXU
1 stop4h 03m
Air Canada
Sat 20/610:05 a.m.
YXU
-
ORD
1 stop4h 17m
Air Canada
Deal found 28/4C$ 723
Wed 27/52:15 p.m.
ORD
-
YXU
1 stop6h 23m
Air Canada
Wed 3/65:10 a.m.
YXU
-
ORD
1 stop4h 50m
Air Canada
Deal found 28/4C$ 739
Sat 27/66:00 a.m.
DCA
-
YXU
2 stops8h 57m
Air Canada
Sun 28/65:10 a.m.
YXU
-
DCA
2 stops6h 50m
Air Canada
Deal found 29/4C$ 765

Find flight deals from USA to London

Keep the following information in mind while searching for USA to London flight deals. Data was last updated 1 May 2026.

Round-trip from

C$ 323

One-way from

C$ 142
WestJet
  • WestJet
  • 12/10-20/10
  • 2 total stops
  • 16h 35m total
  • USA to London
Search Deals
WestJet
  • WestJet
  • 12/10
  • 1 total stop
  • 7h 45m total
  • USA to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from USA to London 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 1 May 2026.
Use the filters below to find and compare flights from the United States to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 5/8

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

1 stop8h 15m

London

Tue 11/8

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

2 stops10h 15m

C$ 439

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 24/8

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

1 stop8h 15m

London

Wed 26/8

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

1 stop8h 50m

C$ 486

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 24/8

4:30 p.m.-9:20 a.m.

2 stops13h 50m

London

Wed 26/8

3:30 p.m.-12:07 a.m.

2 stops11h 37m

C$ 524

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 21/5

10:01 p.m.-5:20 a.m.

2 stops28h 19m

London

Tue 26/5

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

1 stop8h 50m

C$ 536

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 23/5

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

1 stop10h 50m

London

Tue 26/5

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

1 stop11h 30m

C$ 580

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 24/8

11:59 p.m.-2:55 p.m.

2 stops11h 56m

London

Wed 26/8

10:05 a.m.-3:27 p.m.

1 stop8h 22m

C$ 683

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 21/7

10:47 p.m.-9:20 a.m.

1 stop7h 33m

London

Thu 23/7

6:20 p.m.-1:57 a.m.

2 stops10h 37m

C$ 692

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 10/7

11:47 p.m.-2:55 p.m.

2 stops12h 08m

London

Tue 14/7

5:10 a.m.-3:09 p.m.

2 stops12h 59m

C$ 703

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 10/7

10:47 p.m.-9:20 a.m.

1 stop7h 33m

London

Mon 13/7

6:20 p.m.-9:09 a.m.

1 stop17h 49m

C$ 704

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 13/6

9:55 a.m.-2:58 p.m.

1 stop4h 03m

London

Sat 20/6

10:05 a.m.-1:22 p.m.

1 stop4h 17m

C$ 723

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from USA to London

Have a flexible travel schedule? Discover the best time to fly to London from USA 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 the United States to London
No data available for this route at this time. Please check back soon.

Related info for your journey

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

    London (YXU), located 8.6 km from the city centre, is the airport you fly into when you book flights from United States to London.

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

    Airlines like WestJet, Air Canada, and Delta fly from USA to London, Ontario in about 4h 03m. The time it takes to get you to your destination can typically vary by up to 7h 42m. USA and London, Ontario are separated by a distance of 565 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The most popular route from USA to London, Ontario is Newark - London. You may also consider San Francisco - London or Dallas/Fort Worth - London.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from USA to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Port Stanley
Grand Bend

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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 USA to London?

Deals for USA to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights simply makes it quick and affordable to book flights from USA to London 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 USA to London with no change fees?

Yes, we can. To see specific flights from USA to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights offers price alerts on USA to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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