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Cheap flights from the United States to London, ON from C$ 278

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 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
28 Aug — 4 Sep1
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 29 July 2026.

Thu 13/87:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Sun 6/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 25/7C$ 586
Wed 12/87:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Sun 6/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 25/7C$ 587
Wed 12/87:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Sat 5/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 25/7C$ 593
Thu 13/812:15 p.m.
DEN
-
YXU
1 stop29h 35m
WestJet
Mon 17/85:55 p.m.
YXU
-
DEN
1 stop19h 25m
WestJet
Deal found 25/7C$ 598
Wed 12/87:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Wed 2/95:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Deal found 25/7C$ 602
Tue 8/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Tue 15/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 27/7C$ 607
Sat 15/87:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Thu 3/98:40 p.m.
YXU
-
SEA
1 stop16h 00m
WestJet
Deal found 25/7C$ 614
Sat 15/87:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Wed 2/95:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Deal found 25/7C$ 626
Wed 12/87:00 a.m.
SEA
-
YXU
1 stop6h 45m
Multiple Airlines
Tue 1/96:10 a.m.
YXU
-
SEA
2 stops32h 12m
Multiple Airlines
Deal found 25/7C$ 642
Wed 12/87:35 p.m.
SEA
-
YXU
1 stop6h 45m
Multiple Airlines
Wed 2/96:10 a.m.
YXU
-
SEA
2 stops18h 50m
Multiple Airlines
Deal found 25/7C$ 645
Sun 16/810:30 a.m.
SEA
-
YXU
1 stop15h 50m
WestJet
Sat 5/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 25/7C$ 648
Tue 8/95:30 p.m.
ORD
-
YXU
1 stop10h 50m
WestJet
Tue 15/96:10 a.m.
YXU
-
ORD
1 stop11h 30m
WestJet
Deal found 24/7C$ 698

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 29 July 2026.

Round-trip from

C$ 586

One-way from

C$ 278
WestJet
  • WestJet
  • 13/8-6/9
  • 2 total stops
  • 22h 20m total
  • USA to London
Search Deals
WestJet
  • WestJet
  • 28/8
  • 1 total stop
  • 6h 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 29 July 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

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Thu 13/8

12:15 p.m.-7:50 p.m.

1 stop29h 35m

London

Mon 17/8

5:55 p.m.-11:20 a.m.

1 stop19h 25m

C$ 598

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 8/9

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

1 stop6h 45m

London

Tue 15/9

6:10 a.m.-8:32 p.m.

2 stops17h 22m

C$ 760

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 8/9

9:20 p.m.-5:20 a.m.

2 stops31h 00m

London

Tue 15/9

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

1 stop11h 30m

C$ 779

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 13/8

7:00 a.m.-4:45 p.m.

1 stop6h 45m

London

Tue 1/9

6:10 a.m.-7:55 p.m.

2 stops16h 45m

C$ 892

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 7/9

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

1 stop10h 50m

London

Mon 14/9

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

1 stop11h 30m

C$ 934

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Fri 11/9

12:15 p.m.-5:20 a.m.

1 stop15h 05m

London

Fri 18/9

6:10 a.m.-9:43 a.m.

2 stops29h 33m

C$ 938

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 11/9

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

1 stop10h 50m

London

Fri 18/9

3:30 p.m.-7:48 p.m.

1 stop5h 18m

C$ 941

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 7/9

11:05 a.m.-9:40 p.m.

2 stops9h 35m

London

Mon 14/9

5:55 p.m.-2:55 p.m.

2 stops22h 00m

C$ 942

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Wed 2/9

5:30 p.m.-4:45 p.m.

1 stop22h 15m

London

Mon 7/9

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

1 stop11h 30m

C$ 974

NewarkLondon

EWR - YXU

EWRYXU

Newark

Tue 18/8

6:25 a.m.-5:20 a.m.

3 stops22h 55m

London

Tue 25/8

8:40 p.m.-4:55 p.m.

2 stops20h 15m

C$ 992

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/7

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, Delta, and Air Canada fly from USA to London, Ontario in about 6h 05m. The time it takes to get you to your destination can typically vary by up to 23h 30m. USA and London, Ontario are separated by a distance of 652 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 New York LaGuardia - London or Washington, D.C. Dulles Intl - 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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Alternative routes for USA to London

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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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