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Cheap flights from the United States to London, ON from C$ 329

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 16/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
5 Apr — 12 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 6 March 2026.

Thu 16/43:10 p.m.
SEA
-
YXU
1 stop12h 25m
WestJet
Thu 23/48:00 a.m.
YXU
-
SEA
1 stop9h 19m
WestJet
Deal found 5/3C$ 412
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 4/3C$ 418
Mon 20/411:55 a.m.
SEA
-
YXU
2 stops15h 40m
WestJet
Mon 27/46:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 5/3C$ 493
Wed 29/47:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Sun 3/55:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Deal found 3/3C$ 534
Fri 4/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Mon 7/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 5/3C$ 557
Thu 16/48:41 a.m.
SEA
-
YXU
2 stops18h 54m
Multiple Airlines
Thu 23/48:00 a.m.
YXU
-
SEA
1 stop9h 19m
Multiple Airlines
Deal found 2/3C$ 560
Mon 20/48:00 p.m.
SEA
-
YXU
2 stops9h 44m
Air Canada
Mon 27/45:40 p.m.
YXU
-
SEA
2 stops18h 58m
Air Canada
Deal found 5/3C$ 590
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 5/3C$ 593
Mon 20/42:20 p.m.
ORD
-
YXU
1 stop15h 15m
WestJet
Mon 27/46:10 a.m.
YXU
-
ORD
1 stop11h 30m
WestJet
Deal found 5/3C$ 600
Mon 20/47:56 p.m.
ORD
-
YXU
2 stops33h 39m
Multiple Airlines
Mon 27/46:10 a.m.
YXU
-
ORD
1 stop11h 30m
Multiple Airlines
Deal found 5/3C$ 608
Sun 19/46:30 a.m.
EWR
-
YXU
2 stops10h 34m
Air Canada
Sun 26/45:10 a.m.
YXU
-
EWR
1 stop5h 08m
Air Canada
Deal found 5/3C$ 608
Sun 19/46:30 a.m.
LGA
-
YXU
2 stops10h 34m
Air Canada
Sun 26/45:40 p.m.
YXU
-
LGA
1 stop4h 51m
Air Canada
Deal found 5/3C$ 608

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 6 March 2026.

Round-trip from

C$ 412

One-way from

C$ 329
WestJet
  • WestJet
  • 16/4-23/4
  • 2 total stops
  • 21h 44m total
  • USA to London
Search Deals
Air Canada
  • Air Canada
  • 16/4
  • 1 total stop
  • 6h 14m 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 6 March 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

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$ 444

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 20/4

11:55 a.m.-6:35 a.m.

2 stops15h 40m

London

Mon 27/4

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

1 stop15h 35m

C$ 493

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 16/4

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

1 stop12h 25m

London

Thu 23/4

8:00 a.m.-10:25 a.m.

2 stops29h 25m

C$ 544

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 16/4

8:41 a.m.-6:35 a.m.

2 stops18h 54m

London

Thu 23/4

8:00 a.m.-2:19 p.m.

1 stop9h 19m

C$ 560

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 29/4

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

1 stop6h 45m

London

Sun 3/5

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

1 stop15h 35m

C$ 585

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$ 593

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 20/4

7:56 p.m.-6:35 a.m.

2 stops33h 39m

London

Mon 27/4

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

1 stop11h 30m

C$ 608

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 16/4

8:00 p.m.-8:44 a.m.

2 stops9h 44m

London

Thu 23/4

5:10 a.m.-3:08 p.m.

2 stops12h 58m

C$ 630

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 18/4

8:40 a.m.-9:19 p.m.

2 stops11h 39m

London

Sat 25/4

5:10 a.m.-2:55 p.m.

2 stops10h 45m

C$ 637

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 17/4

8:00 p.m.-8:44 a.m.

2 stops9h 44m

London

Fri 24/4

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

2 stops12h 55m

C$ 660

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

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, Air Canada, and Delta fly from USA to London, Ontario in about 9h 44m. The time it takes to get you to your destination can typically vary by up to 1h 45m. 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 Chicago O'Hare Intl - London. You may also consider New York LaGuardia - London or New York John F Kennedy 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.

  • 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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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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