Find flights
When to book
FAQs

Cheap flights from the United States to London, ON from C$ 177

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 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
20 Jun — 27 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 21 May 2026.

Tue 30/67:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Tue 7/75:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Deal found 16/5C$ 380
Mon 12/106:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Wed 21/106:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 18/5C$ 393
Thu 10/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Sun 13/95:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Deal found 17/5C$ 425
Tue 22/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Wed 7/106:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 18/5C$ 431
Sun 11/101:00 p.m.
SFO
-
YXU
1 stop13h 20m
WestJet
Wed 21/106:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 18/5C$ 437
Wed 26/86:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Wed 23/96:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 19/5C$ 450
Mon 24/86:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Sun 30/82:40 p.m.
YXU
-
SFO
2 stops10h 15m
WestJet
Deal found 16/5C$ 472
Wed 9/910:30 a.m.
SEA
-
YXU
1 stop15h 50m
WestJet
Wed 23/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 18/5C$ 476
Tue 8/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Fri 11/95:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Deal found 19/5C$ 514
Sun 11/104:35 p.m.
SFO
-
YXU
2 stops13h 45m
Air Canada
Wed 21/105:40 a.m.
YXU
-
SFO
1 stop7h 59m
Air Canada
Deal found 19/5C$ 517
Tue 8/98:10 a.m.
SFO
-
YXU
2 stops10h 30m
Air Canada
Fri 11/95:40 a.m.
YXU
-
SFO
1 stop7h 59m
Air Canada
Deal found 19/5C$ 521
Tue 8/96:00 a.m.
SFO
-
YXU
1 stop20h 20m
WestJet
Fri 11/96:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 20/5C$ 530

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 21 May 2026.

Round-trip from

C$ 380

One-way from

C$ 177
WestJet
  • WestJet
  • 30/6-7/7
  • 2 total stops
  • 34h 35m total
  • USA to London
Search Deals
WestJet
  • WestJet
  • 28/7
  • 1 total stop
  • 8h 15m 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 21 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

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 30/6

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

1 stop6h 45m

London

Tue 7/7

5:55 p.m.-6:45 p.m.

1 stop27h 50m

C$ 380

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 12/10

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

1 stop7h 45m

London

Wed 21/10

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

1 stop8h 50m

C$ 393

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 26/8

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

1 stop7h 45m

London

Wed 23/9

6:10 a.m.-9:55 p.m.

1 stop18h 45m

C$ 454

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 9/9

10:30 a.m.-5:20 a.m.

1 stop15h 50m

London

Wed 23/9

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

1 stop15h 35m

C$ 476

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 8/9

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

1 stop6h 45m

London

Fri 11/9

5:55 p.m.-6:45 p.m.

1 stop27h 50m

C$ 514

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 8/9

8:10 a.m.-9:40 p.m.

2 stops10h 30m

London

Fri 11/9

10:05 a.m.-3:24 p.m.

1 stop8h 19m

C$ 521

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 10/9

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

1 stop6h 45m

London

Sun 13/9

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

2 stops22h 00m

C$ 659

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 30/6

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

1 stop6h 45m

London

Tue 7/7

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

3 stops22h 00m

C$ 701

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 24/9

12:35 a.m.-2:55 p.m.

2 stops11h 20m

London

Sun 27/9

3:30 p.m.-6:41 a.m.

2 stops18h 11m

C$ 707

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 26/8

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

2 stops9h 45m

London

Wed 23/9

10:05 a.m.-5:23 p.m.

2 stops10h 18m

C$ 723

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 6h 45m. The time it takes to get you to your destination can typically vary by up to 5h. USA and London, Ontario are separated by a distance of 3219 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 New York LaGuardia - 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for USA to London

See prices for flight routes from nearby airports that may be better suited for you.
Vancouver Intl to Pearson Intl flights
Vancouver Intl to Hamilton flights
Vancouver Intl to Toronto Island flights
Abbotsford to Pearson Intl flights
Newark to Toronto Island flights
Newark to Pearson Intl flights
LaGuardia to Pearson Intl flights
Vancouver Intl to Pierre Elliott Trudeau Intl flights
Calgary to Pearson Intl flights
John F Kennedy Intl to Pearson Intl flights
Newark to Pierre Elliott Trudeau Intl flights
Vancouver Intl to Region of Waterloo Intl flights
Calgary to Hamilton flights
Pearson Intl to Pierre Elliott Trudeau Intl flights
Winnipeg to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Mexico City to Pearson Intl flights
Edmonton to Pearson Intl flights
Halifax to Hamilton flights
Los Angeles to Pearson Intl flights
Calgary to Pierre Elliott Trudeau Intl flights
Toronto Island to Pierre Elliott Trudeau Intl flights
Reagan-National to Pearson Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
Pierre Elliott Trudeau Intl to Pearson Intl flights
Pierre Elliott Trudeau Intl to Toronto Island flights
Dallas/Fort Worth to Pearson Intl flights
Halifax to Pearson Intl flights
San Francisco to Pearson Intl flights
Calgary to Toronto Island flights
O'Hare Intl to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Edmonton to Hamilton flights
Halifax to Toronto Island flights
St. John's to Pearson Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
Halifax to Pierre Elliott Trudeau Intl flights
Winnipeg to Hamilton flights
Kelowna to Pearson Intl flights
LaGuardia to Toronto Island flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Calgary to Region of Waterloo Intl flights
Mexico City to Pierre Elliott Trudeau Intl flights
Halifax to Region of Waterloo Intl flights
Boston to Pearson Intl flights
Dulles Intl to Toronto Island flights
Pearson Intl to Ottawa flights
Edmonton to Toronto Island flights
Atlanta to Pearson Intl 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 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.