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Cheap flights from the United States to London, ON from C$ 240

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 22/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
6 Jan — 13 Jan1
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 7 December 2025.

Sun 28/1211:05 a.m.EWR - YXU
1 stop6h 00mAir Canada
Sun 4/19:50 a.m.YXU - EWR
1 stop5h 53mAir Canada
Deal found 4/12C$ 901
Sun 28/124:20 p.m.LGA - YXU
1 stop5h 01mAir Canada
Sun 4/15:10 a.m.YXU - LGA
1 stop4h 03mAir Canada
Deal found 7/12C$ 942
Sun 28/1211:05 a.m.EWR - YXU
1 stop6h 00mUnited Airlines
Sun 4/15:10 a.m.YXU - EWR
2 stops6h 23mUnited Airlines
Deal found 4/12C$ 1,067
Mon 22/1211:05 a.m.EWR - YXU
1 stop6h 00mAir Canada
Fri 2/15:40 p.m.YXU - EWR
1 stop5h 08mAir Canada
Deal found 7/12C$ 1,105
Mon 22/1211:30 a.m.LGA - YXU
1 stop5h 35mAir Canada
Fri 2/15:10 a.m.YXU - LGA
1 stop5h 33mAir Canada
Deal found 7/12C$ 1,105
Fri 12/125:57 p.m.EWR - YXU
2 stops21h 38mMultiple Airlines
Thu 8/18:10 p.m.YXU - EWR
2 stops23h 36mMultiple Airlines
Deal found 5/12C$ 1,137
Fri 12/124:30 p.m.EWR - YXU
1 stop4h 51mAir Canada
Thu 8/19:50 a.m.YXU - EWR
1 stop5h 53mAir Canada
Deal found 5/12C$ 1,301
Mon 22/128:00 a.m.EWR - YXU
1 stop9h 05mUnited Airlines
Fri 2/15:10 a.m.YXU - EWR
2 stops9h 12mUnited Airlines
Deal found 7/12C$ 1,366
Fri 12/125:20 p.m.EWR - YXU
1 stop4h 01mUnited Airlines
Thu 8/15:10 a.m.YXU - EWR
2 stops11h 39mUnited Airlines
Deal found 5/12C$ 1,373
Sun 28/129:45 a.m.JFK - YXU
1 stop11h 36mAir Canada
Sun 4/19:50 a.m.YXU - JFK
1 stop6h 19mAir Canada
Deal found 7/12C$ 1,387
Sun 28/123:30 p.m.LGA - YXU
1 stop5h 51mUnited Airlines
Sun 4/19:50 a.m.YXU - LGA
2 stops8h 54mUnited Airlines
Deal found 7/12C$ 1,405
Mon 22/129:45 a.m.JFK - YXU
1 stop7h 20mAir Canada
Fri 2/19:25 a.m.YXU - JFK
1 stop6h 44mAir Canada
Deal found 7/12C$ 1,742

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 7 December 2025.

Round-trip from

C$ 497

One-way from

C$ 265
WestJet
  • WestJet
  • 15/1-19/1
  • 2 total stops
  • 33h 36m total
  • USA to London
Search Deals
21/1
  • 21/1
  • 3 total stops
  • 42h 59m 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 7 December 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

Wed 21/1

2:08 p.m.-6:34 a.m.

2 stops13h 26m

London

Wed 28/1

8:10 p.m.-12:12 p.m.

1 stop19h 02m

C$ 514

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 21/1

12:00 p.m.-8:46 a.m.

1 stop17h 46m

London

Wed 28/1

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

1 stop8h 44m

C$ 624

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 15/1

1:00 p.m.-6:34 a.m.

1 stop14h 34m

London

Mon 19/1

8:10 p.m.-12:12 p.m.

1 stop19h 02m

C$ 647

NewarkLondon

EWR - YXU

EWRYXU

Newark

Tue 20/1

5:45 a.m.-6:34 a.m.

3 stops24h 49m

London

Tue 27/1

8:10 p.m.-11:58 p.m.

3 stops27h 48m

C$ 648

New YorkLondon

LGA - YXU

LGAYXU

New York LaGuardia

Tue 20/1

11:59 a.m.-6:34 a.m.

2 stops18h 35m

London

Tue 27/1

8:10 p.m.-7:00 p.m.

3 stops22h 50m

C$ 660

New YorkLondon

JFK - YXU

JFKYXU

New York John F Kennedy Intl

Thu 22/1

6:10 a.m.-6:34 a.m.

2 stops24h 24m

London

Thu 29/1

8:10 p.m.-4:37 p.m.

1 stop20h 27m

C$ 670

AtlantaLondon

ATL - YXU

ATLYXU

Atlanta Hartsfield-Jackson

Mon 2/2

8:25 a.m.-6:35 a.m.

2 stops22h 10m

London

Fri 6/2

7:30 a.m.-6:52 a.m.

2 stops23h 22m

C$ 718

NewarkLondon

EWR - YXU

EWRYXU

Newark

Tue 20/1

4:30 p.m.-9:21 p.m.

1 stop4h 51m

London

Tue 27/1

9:50 a.m.-1:40 p.m.

1 stop3h 50m

C$ 728

New YorkLondon

LGA - YXU

LGAYXU

New York LaGuardia

Tue 20/1

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

1 stop4h 00m

London

Tue 27/1

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

1 stop4h 03m

C$ 728

New YorkLondon

JFK - YXU

JFKYXU

New York John F Kennedy Intl

Tue 20/1

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

1 stop4h 31m

London

Tue 27/1

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

1 stop4h 59m

C$ 728

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/12

Showing 1-10 of 50 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$ 73). Flying from USA to London, Ontario in August is currently the most expensive (average of C$ 158). 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 7 December 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, WestJet, and United Airlines fly from USA to London, Ontario in about 12h 50m. The time it takes to get you to your destination can typically vary by up to 4h 56m. USA and London, Ontario are separated by a distance of 1260 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 San Francisco - London. You may also consider Lambert-St Louis - London or Minneapolis St Paul - 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$ 73). Flying from USA to London, Ontario in August is currently the most expensive (average of C$ 158). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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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