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Cheap flights from the United States to London, ON from C$ 144

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
17 Mar — 24 Mar1
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 15 February 2026.

Thu 5/38:00 p.m.
SEA
-
YXU
2 stops9h 46m
Air Canada
Sun 8/35:40 p.m.
YXU
-
SEA
1 stop7h 36m
Air Canada
Deal found 14/2C$ 425
Mon 25/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
WestJet
Thu 28/56:10 a.m.
YXU
-
ORD
1 stop11h 30m
WestJet
Deal found 14/2C$ 428
Tue 31/35:40 a.m.
SEA
-
YXU
2 stops12h 38m
Air Canada
Tue 7/49:25 a.m.
YXU
-
SEA
1 stop15h 28m
Air Canada
Deal found 14/2C$ 485
Sun 29/38:00 a.m.
SEA
-
YXU
1 stop10h 18m
Air Canada
Sun 5/49:25 a.m.
YXU
-
SEA
1 stop15h 28m
Air Canada
Deal found 12/2C$ 486
Sat 23/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
WestJet
Tue 26/55:55 p.m.
YXU
-
ORD
1 stop23h 45m
WestJet
Deal found 13/2C$ 500
Sat 28/310:25 p.m.
TPA
-
YXU
1 stop10h 18m
Air Canada
Sat 4/45:10 a.m.
YXU
-
TPA
1 stop5h 45m
Air Canada
Deal found 11/2C$ 527
Sun 29/310:10 p.m.
TPA
-
YXU
1 stop10h 33m
Air Canada
Sun 5/45:40 p.m.
YXU
-
TPA
1 stop5h 10m
Air Canada
Deal found 12/2C$ 528
Wed 11/37:00 a.m.
SEA
-
YXU
2 stops11h 21m
United Airlines
Wed 18/35:40 p.m.
YXU
-
SEA
1 stop7h 36m
United Airlines
Deal found 11/2C$ 547
Sat 14/310:25 p.m.
TPA
-
YXU
1 stop10h 21m
Air Canada
Sat 21/39:40 a.m.
YXU
-
TPA
2 stops11h 32m
Air Canada
Deal found 13/2C$ 551
Wed 1/411:35 p.m.
SEA
-
YXU
2 stops14h 28m
United Airlines
Wed 8/45:10 a.m.
YXU
-
SEA
2 stops20h 46m
United Airlines
Deal found 14/2C$ 569
Mon 6/44:15 p.m.
ATL
-
YXU
1 stop14h 20m
WestJet
Mon 13/48:10 p.m.
YXU
-
ATL
1 stop10h 43m
WestJet
Deal found 14/2C$ 622
Wed 1/712:00 p.m.
TPA
-
YXU
2 stops9h 40m
Air Canada
Wed 15/76:00 a.m.
YXU
-
TPA
1 stop5h 03m
Air Canada
Deal found 13/2C$ 629

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 15 February 2026.

Round-trip from

C$ 425

One-way from

C$ 144
Air Canada
  • Air Canada
  • 5/3-8/3
  • 3 total stops
  • 17h 22m total
  • USA to London
Search Deals
WestJet
  • WestJet
  • 9/5
  • 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 15 February 2026.
Use the filters below to find and compare flights from the United States to London that are best for you.

Fly from

USA

Fly to

London

Route

Depart

Return

Price

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 5/3

8:00 p.m.-8:46 a.m.

2 stops9h 46m

London

Sun 8/3

5:40 p.m.-10:16 p.m.

1 stop7h 36m

C$ 425

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 25/5

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

1 stop10h 50m

London

Thu 28/5

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

1 stop11h 30m

C$ 428

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 29/3

5:50 a.m.-9:18 p.m.

2 stops12h 28m

London

Sun 5/4

5:10 a.m.-3:05 p.m.

2 stops12h 55m

C$ 459

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

5:55 p.m.-4:40 p.m.

1 stop23h 45m

C$ 500

TampaLondon

TPA - YXU

TPAYXU

Tampa

Sat 28/3

10:25 p.m.-8:43 a.m.

1 stop10h 18m

London

Sat 4/4

5:10 a.m.-10:55 a.m.

1 stop5h 45m

C$ 527

TampaLondon

TPA - YXU

TPAYXU

Tampa

Sun 29/3

10:10 p.m.-8:43 a.m.

1 stop10h 33m

London

Sun 5/4

5:40 p.m.-10:50 p.m.

1 stop5h 10m

C$ 528

TampaLondon

TPA - YXU

TPAYXU

Tampa

Sat 14/3

10:25 p.m.-8:46 a.m.

1 stop10h 21m

London

Sat 21/3

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

2 stops11h 32m

C$ 551

AtlantaLondon

ATL - YXU

ATLYXU

Atlanta Hartsfield-Jackson

Mon 6/4

4:15 p.m.-6:35 a.m.

1 stop14h 20m

London

Mon 13/4

8:10 p.m.-6:53 a.m.

1 stop10h 43m

C$ 624

TampaLondon

TPA - YXU

TPAYXU

Tampa

Wed 1/7

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

2 stops9h 40m

London

Wed 15/7

6:00 a.m.-11:03 a.m.

1 stop5h 03m

C$ 629

TampaLondon

TPA - YXU

TPAYXU

Tampa

Sat 28/3

6:00 a.m.-5:05 p.m.

2 stops11h 05m

London

Sat 4/4

9:25 a.m.-7:35 p.m.

2 stops10h 10m

C$ 645

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/2

Showing 1-10 of 55 results
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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, March is the cheapest month in which you can book a flight from USA to London, Ontario (average of C$ 72). Flying from USA to London, Ontario in August is currently the most expensive (average of C$ 152). 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 Air Canada, WestJet, and Delta fly from USA to London, Ontario in about 9h 46m. The time it takes to get you to your destination can typically vary by up to 1h 43m. 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 Milwaukee-Mitchell - London. You may also consider San Jose - 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.

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

    Currently, March is the cheapest month in which you can book a flight from USA to London, Ontario (average of C$ 72). Flying from USA to London, Ontario in August is currently the most expensive (average of C$ 152). 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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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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