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Cheap flights from the United States to London, ON from C$ 256

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
29 Mar — 5 Apr1
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 27 February 2026.

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 25/2C$ 390
Tue 7/49:08 p.m.
ATL
-
YXU
2 stops21h 55m
Multiple Airlines
Tue 14/48:00 a.m.
YXU
-
ATL
1 stop22h 53m
Multiple Airlines
Deal found 24/2C$ 472
Thu 9/43:10 p.m.
SEA
-
YXU
1 stop12h 25m
WestJet
Thu 16/48:10 p.m.
YXU
-
SEA
2 stops17h 15m
WestJet
Deal found 23/2C$ 502
Wed 22/77:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Sun 26/75:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Deal found 23/2C$ 535
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 25/2C$ 543
Fri 1/55:30 p.m.
ORD
-
YXU
1 stop10h 50m
Multiple Airlines
Mon 4/56:10 a.m.
YXU
-
ORD
2 stops25h 37m
Multiple Airlines
Deal found 23/2C$ 554
Wed 22/77:20 p.m.
SEA
-
YXU
2 stops10h 35m
Air Canada
Sun 26/73:30 p.m.
YXU
-
SEA
1 stop8h 37m
Air Canada
Deal found 23/2C$ 618
Sat 28/35:40 a.m.
SEA
-
YXU
2 stops12h 41m
Air Canada
Sat 4/45:10 a.m.
YXU
-
SEA
2 stops12h 55m
Air Canada
Deal found 26/2C$ 631
Thu 12/311:05 a.m.
EWR
-
YXU
1 stop6h 00m
Air Canada
Wed 18/39:40 a.m.
YXU
-
EWR
1 stop3h 58m
Air Canada
Deal found 25/2C$ 631
Thu 12/31:05 p.m.
LGA
-
YXU
1 stop4h 00m
Air Canada
Wed 18/39:40 a.m.
YXU
-
LGA
1 stop4h 48m
Air Canada
Deal found 25/2C$ 631
Sat 11/45:40 a.m.
SEA
-
YXU
2 stops12h 39m
Air Canada
Sat 18/49:25 a.m.
YXU
-
SEA
1 stop15h 28m
Air Canada
Deal found 25/2C$ 657
Thu 12/39:45 a.m.
JFK
-
YXU
1 stop7h 20m
Air Canada
Wed 18/35:40 p.m.
YXU
-
JFK
1 stop4h 59m
Air Canada
Deal found 25/2C$ 674

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 27 February 2026.

Round-trip from

C$ 390

One-way from

C$ 256
WestJet
  • WestJet
  • 1/5-4/5
  • 2 total stops
  • 22h 20m total
  • USA to London
Search Deals
20/4
  • 20/4
  • 2 total stops
  • 36h 16m 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 27 February 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

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 1/5

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

1 stop10h 50m

London

Mon 4/5

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

1 stop11h 30m

C$ 390

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 9/4

3:10 p.m.-6:35 a.m.

1 stop12h 25m

London

Thu 16/4

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

2 stops17h 15m

C$ 502

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$ 543

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 1/5

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

1 stop10h 50m

London

Mon 4/5

6:10 a.m.-6:47 a.m.

2 stops25h 37m

C$ 554

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 9/4

5:40 a.m.-9:18 p.m.

2 stops12h 38m

London

Thu 16/4

9:25 a.m.-7:20 p.m.

2 stops12h 55m

C$ 631

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 28/3

5:40 a.m.-9:21 p.m.

2 stops12h 41m

London

Sat 4/4

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

2 stops12h 55m

C$ 631

New YorkLondon

LGA - YXU

LGAYXU

New York LaGuardia

Thu 12/3

1:05 p.m.-5:05 p.m.

1 stop4h 00m

London

Wed 18/3

9:40 a.m.-2:28 p.m.

1 stop4h 48m

C$ 631

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 26/3

5:40 a.m.-9:21 p.m.

2 stops12h 41m

London

Mon 30/3

9:40 a.m.-9:53 p.m.

1 stop15h 13m

C$ 657

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 11/4

5:40 a.m.-9:19 p.m.

2 stops12h 39m

London

Sat 18/4

9:25 a.m.-9:53 p.m.

1 stop15h 28m

C$ 657

AtlantaLondon

ATL - YXU

ATLYXU

Atlanta Hartsfield-Jackson

Sun 12/4

4:15 p.m.-7:03 p.m.

1 stop26h 48m

London

Sun 19/4

8:10 p.m.-9:30 a.m.

2 stops37h 20m

C$ 683

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/2

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, 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$ 153). 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 and Air Canada fly from USA to London, Ontario in about 10h 50m. The time it takes to get you to your destination can typically vary by up to 1h 48m. 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 Chicago O'Hare Intl - London or Atlanta Hartsfield-Jackson - 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$ 153). 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

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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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