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Cheap flights from the United States to London, ON from C$ 281

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 24/3. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 November 2025.

Fri 21/118:10 a.m.SEA - YXU
1 stop10h 11mAir Canada
Fri 28/115:40 p.m.YXU - SEA
1 stop7h 36mAir Canada
Deal found 4/11C$ 707
Fri 5/126:05 a.m.LGA - YXU
2 stops11h 00mAir Canada
Thu 11/125:10 a.m.YXU - LGA
1 stop4h 03mAir Canada
Deal found 5/11C$ 711
Fri 5/1211:05 a.m.EWR - YXU
1 stop6h 00mAir Canada
Thu 11/129:25 a.m.YXU - EWR
1 stop4h 15mAir Canada
Deal found 5/11C$ 722
Fri 28/114:50 p.m.JFK - YXU
1 stop4h 31mAir Canada
Fri 5/125:40 p.m.YXU - JFK
1 stop4h 59mAir Canada
Deal found 5/11C$ 762
Thu 11/121:52 p.m.ORD - YXU
2 stops15h 42mMultiple Airlines
Sun 14/128:10 p.m.YXU - ORD
1 stop18h 25mMultiple Airlines
Deal found 5/11C$ 803
Fri 21/118:10 a.m.SEA - YXU
1 stop10h 11mMultiple Airlines
Fri 28/118:10 p.m.YXU - SEA
3 stops16h 21mMultiple Airlines
Deal found 4/11C$ 835
Fri 5/129:45 a.m.JFK - YXU
1 stop7h 20mAir Canada
Thu 11/129:25 a.m.YXU - JFK
2 stops11h 33mAir Canada
Deal found 5/11C$ 858
Thu 11/123:55 p.m.ORD - YXU
1 stop4h 26mAir Canada
Sun 14/129:25 a.m.YXU - ORD
1 stop4h 36mAir Canada
Deal found 5/11C$ 876
Thu 18/1211:05 a.m.EWR - YXU
1 stop6h 00mAir Canada
Thu 25/125:10 a.m.YXU - EWR
1 stop5h 15mAir Canada
Deal found 5/11C$ 876
Sat 20/1210:00 a.m.ORD - YXU
1 stop6h 05mAir Canada
Sat 27/125:10 a.m.YXU - ORD
2 stops7h 08mAir Canada
Deal found 5/11C$ 885
Sun 21/129:05 a.m.EWR - YXU
1 stop8h 00mAir Canada
Sun 28/125:10 a.m.YXU - EWR
1 stop5h 15mAir Canada
Deal found 6/11C$ 910
Sat 20/126:05 a.m.LGA - YXU
1 stop11h 00mAir Canada
Sat 27/125:10 a.m.YXU - LGA
1 stop4h 03mAir Canada
Deal found 4/11C$ 910

Cheap 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 November 2025.

Round-trip from

C$ 611

One-way from

C$ 281
Air Canada
  • Air Canada
  • 19/2-20/2
  • 3 total stops
  • 19h 35m total
  • USA to London
Search Deals
Air Canada
  • Air Canada
  • 24/3
  • 2 total stops
  • 13h 21m 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 November 2025.
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

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 19/2

7:30 a.m.-9:21 p.m.

2 stops10h 51m

London

Fri 20/2

5:10 a.m.-10:54 a.m.

1 stop8h 44m

C$ 611

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 21/11

8:10 a.m.-9:21 p.m.

1 stop10h 11m

London

Fri 28/11

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

1 stop7h 36m

C$ 707

New YorkLondon

LGA - YXU

LGAYXU

New York LaGuardia

Fri 5/12

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

2 stops11h 00m

London

Thu 11/12

5:10 a.m.-9:13 a.m.

1 stop4h 03m

C$ 711

NewarkLondon

EWR - YXU

EWRYXU

Newark

Fri 5/12

11:05 a.m.-5:05 p.m.

1 stop6h 00m

London

Thu 11/12

9:25 a.m.-1:40 p.m.

1 stop4h 15m

C$ 722

New YorkLondon

JFK - YXU

JFKYXU

New York John F Kennedy Intl

Fri 28/11

4:50 p.m.-9:21 p.m.

1 stop4h 31m

London

Fri 5/12

5:40 p.m.-10:39 p.m.

1 stop4h 59m

C$ 762

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 11/12

1:52 p.m.-6:34 a.m.

2 stops15h 42m

London

Sun 14/12

8:10 p.m.-1:35 p.m.

1 stop18h 25m

C$ 803

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 19/2

6:05 p.m.-8:46 a.m.

2 stops11h 41m

London

Mon 23/2

5:10 a.m.-11:53 a.m.

1 stop9h 43m

C$ 822

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 21/11

8:10 a.m.-9:21 p.m.

1 stop10h 11m

London

Fri 28/11

8:10 p.m.-9:31 a.m.

3 stops16h 21m

C$ 835

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Wed 4/3

8:10 a.m.-6:35 a.m.

2 stops19h 25m

London

Wed 18/3

8:10 p.m.-10:04 p.m.

2 stops28h 54m

C$ 846

New YorkLondon

JFK - YXU

JFKYXU

New York John F Kennedy Intl

Fri 5/12

9:45 a.m.-5:05 p.m.

1 stop7h 20m

London

Thu 11/12

9:25 a.m.-8:58 p.m.

2 stops11h 33m

C$ 858

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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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$ 75). Flying from USA to London, Ontario in August is currently the most expensive (average of C$ 161). 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.

What is the cheapest time of day to fly from US to YXU?

Find hourly flight availability from USA to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 November 2025.

When flying from USA to London, Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 18% versus a flight in the afternoon.

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 and United Airlines fly from USA to London, Ontario in about 10h 51m. The time it takes to get you to your destination can typically vary by up to 14h 12m. 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 cheapest airlines to fly from USA to London, Ontario one-way?

    C$ 281 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from C$ 477 and C$ 480, respectively.

  • 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 John F Kennedy Intl - 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$ 75). Flying from USA to London, Ontario in August is currently the most expensive (average of C$ 161). 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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