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Cheap flights from the United States to London, ON from C$ 252

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.
LAX — YXU
14 May — 21 May1
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 14 April 2026.

Thu 9/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Tue 14/78:40 p.m.
YXU
-
SFO
1 stop28h 15m
WestJet
Deal found 14/4C$ 521
Sat 6/66:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Mon 29/65:55 p.m.
YXU
-
SFO
1 stop25h 45m
WestJet
Deal found 9/4C$ 577
Tue 21/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Mon 27/75:55 p.m.
YXU
-
SFO
1 stop21h 05m
WestJet
Deal found 9/4C$ 646
Sat 9/58:05 a.m.
SFO
-
YXU
2 stops10h 33m
Air Canada
Wed 13/55:10 a.m.
YXU
-
SFO
1 stop8h 40m
Air Canada
Deal found 9/4C$ 651
Tue 11/87:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Tue 25/88:40 p.m.
YXU
-
SEA
1 stop16h 00m
WestJet
Deal found 9/4C$ 658
Fri 31/712:15 p.m.
DEN
-
YXU
1 stop15h 05m
WestJet
Sun 9/85:55 p.m.
YXU
-
DEN
1 stop19h 25m
WestJet
Deal found 14/4C$ 701
Thu 28/58:00 a.m.
SEA
-
YXU
1 stop10h 38m
Multiple Airlines
Thu 4/66:10 a.m.
YXU
-
SEA
1 stop15h 35m
Multiple Airlines
Deal found 12/4C$ 725
Sun 6/98:00 a.m.
SEA
-
YXU
1 stop6h 45m
Air Canada
Sat 26/95:40 a.m.
YXU
-
SEA
2 stops11h 42m
Air Canada
Deal found 9/4C$ 729
Sat 10/107:20 p.m.
SEA
-
YXU
2 stops10h 35m
Air Canada
Sun 25/103:25 p.m.
YXU
-
SEA
1 stop9h 51m
Air Canada
Deal found 9/4C$ 738
Sat 6/66:05 p.m.
SFO
-
YXU
1 stop8h 15m
Multiple Airlines
Mon 29/66:10 a.m.
YXU
-
SFO
2 stops17h 20m
Multiple Airlines
Deal found 9/4C$ 745
Sat 10/107:20 p.m.
SEA
-
YXU
2 stops10h 35m
Air Canada
Fri 30/105:45 a.m.
YXU
-
SEA
2 stops11h 46m
Air Canada
Deal found 9/4C$ 747
Wed 28/107:45 a.m.
TPA
-
YXU
1 stop7h 21m
Air Canada
Sun 1/113:25 p.m.
YXU
-
TPA
1 stop6h 12m
Air Canada
Deal found 9/4C$ 747

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 14 April 2026.

Round-trip from

C$ 521

One-way from

C$ 252
WestJet
  • WestJet
  • 9/7-14/7
  • 2 total stops
  • 36h 30m total
  • USA to London
Search Deals
Air Canada
  • Air Canada
  • 4/8
  • 1 total stop
  • 7h 00m 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 14 April 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

Sat 9/5

8:05 a.m.-9:38 p.m.

2 stops10h 33m

London

Wed 13/5

5:10 a.m.-10:50 a.m.

1 stop8h 40m

C$ 651

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Fri 31/7

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

1 stop15h 05m

London

Sun 9/8

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

1 stop19h 25m

C$ 701

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 6/6

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

1 stop8h 15m

London

Mon 29/6

6:10 a.m.-8:30 p.m.

2 stops17h 20m

C$ 745

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 9/7

6:00 a.m.-1:50 p.m.

2 stops28h 50m

London

Tue 14/7

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

2 stops34h 15m

C$ 848
Quickest round-trip

NewarkLondon

EWR - YXU

EWRYXU

Newark

Sat 5/9

6:30 a.m.-11:45 a.m.

1 stop5h 15m

London

Thu 10/9

3:30 p.m.-7:00 p.m.

1 stop3h 30m

C$ 856

TampaLondon

TPA - YXU

TPAYXU

Tampa

Fri 11/9

12:00 p.m.-9:40 p.m.

2 stops9h 40m

London

Mon 14/9

9:30 a.m.-8:07 p.m.

2 stops10h 37m

C$ 866

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 30/5

2:15 p.m.-9:38 p.m.

1 stop6h 23m

London

Wed 3/6

3:30 p.m.-7:25 p.m.

1 stop4h 55m

C$ 868

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 7/5

6:50 a.m.-5:20 a.m.

2 stops21h 30m

London

Sun 10/5

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

1 stop11h 30m

C$ 870

TampaLondon

TPA - YXU

TPAYXU

Tampa

Mon 25/5

9:10 p.m.-11:43 a.m.

1 stop14h 33m

London

Mon 1/6

5:10 a.m.-11:10 a.m.

1 stop6h 00m

C$ 875

TampaLondon

TPA - YXU

TPAYXU

Tampa

Sat 1/8

9:00 p.m.-8:55 a.m.

1 stop11h 55m

London

Sat 8/8

12:20 p.m.-8:04 p.m.

2 stops7h 44m

C$ 888

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

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

What is the cheapest month to book a flight from USA to London, Ontario?

Currently, November is the cheapest month in which you can book a flight from USA to London, Ontario (average of C$ 94). Flying from USA to London, Ontario in March is currently the most expensive (average of C$ 196). 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.

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 United Airlines fly from USA to London, Ontario in about 8h 15m. The time it takes to get you to your destination can typically vary by up to 4h 40m. USA and London, Ontario are separated by a distance of 3508 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 Dallas/Fort Worth - London. You may also consider Seattle/Tacoma Intl - London or Washington, D.C. Reagan-National - 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.

  • What is the cheapest month to book a flight from USA to London, Ontario?

    Currently, November is the cheapest month in which you can book a flight from USA to London, Ontario (average of C$ 94). Flying from USA to London, Ontario in March is currently the most expensive (average of C$ 196). 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

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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