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Cheap flights from the United States to London, ON from C$ 192

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 16/5. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
20 Apr — 27 Apr1
1 adult

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 15 April 2025.

Round-trip from

C$ 231

One-way from

C$ 192
WestJet
  • WestJet
  • 5/5-12/5
  • 2 total stops
  • 17h 43m total
  • USA to London
Search Deals
United Airlines
  • United Airlines
  • 16/5
  • 2 total stops
  • 19h 58m total
  • USA to London
Search Deals

Find flight deals from USA to London

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 April 2025.

Mon 5/58:25 a.m.SEA - YXU
1 stop7h 45mWestJet
Mon 12/56:00 a.m.YXU - SEA
1 stop9h 58mWestJet
Deal found 15/4C$ 231
Fri 30/57:40 p.m.DEN - YXU
1 stop7h 34mWestJet
Fri 6/68:00 p.m.YXU - DEN
1 stop17h 27mWestJet
Deal found 15/4C$ 270
Sat 31/511:30 a.m.SEA - YXU
1 stop6h 58mUnited Airlines
Sat 7/66:15 a.m.YXU - SEA
1 stop7h 36mUnited Airlines
Deal found 15/4C$ 293
Fri 30/57:25 p.m.DEN - YXU
2 stops11h 53mUnited Airlines
Fri 6/66:15 a.m.YXU - DEN
1 stop7h 13mUnited Airlines
Deal found 15/4C$ 295
Sat 31/511:30 a.m.SEA - YXU
1 stop6h 58mAir Canada
Sat 7/69:55 a.m.YXU - SEA
2 stops13h 42mAir Canada
Deal found 15/4C$ 299
Mon 5/58:22 p.m.SEA - YXU
2 stops19h 48mMultiple Airlines
Mon 12/56:00 a.m.YXU - SEA
1 stop9h 58mMultiple Airlines
Deal found 15/4C$ 373
Tue 10/66:05 p.m.SFO - YXU
1 stop8h 09mWestJet
Tue 17/66:00 a.m.YXU - SFO
1 stop9h 05mWestJet
Deal found 15/4C$ 400
Sat 31/56:00 a.m.MCO - YXU
2 stops9h 03mUnited Airlines
Sat 7/69:55 a.m.YXU - MCO
2 stops14h 50mUnited Airlines
Deal found 15/4C$ 435
Thu 15/57:05 p.m.MCO - YXU
2 stops19h 59mMultiple Airlines
Thu 22/56:15 a.m.YXU - MCO
1 stop5h 06mMultiple Airlines
Deal found 15/4C$ 473
Fri 30/55:55 p.m.TPA - YXU
2 stops15h 23mUnited Airlines
Fri 6/66:15 a.m.YXU - TPA
2 stops10h 20mUnited Airlines
Deal found 15/4C$ 484
Fri 30/58:15 p.m.MCO - YXU
1 stop13h 03mAir Canada
Fri 6/66:15 a.m.YXU - MCO
1 stop5h 06mAir Canada
Deal found 15/4C$ 484
Fri 30/55:55 p.m.TPA - YXU
2 stops15h 23mAir Canada
Fri 6/66:15 a.m.YXU - TPA
1 stop4h 55mAir Canada
Deal found 15/4C$ 513

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 April 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

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 5/5

8:25 a.m.-7:10 p.m.

1 stop7h 45m

London

Mon 12/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 231

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Fri 30/5

7:40 p.m.-5:14 a.m.

1 stop7h 34m

London

Fri 6/6

8:00 p.m.-11:27 a.m.

1 stop17h 27m

C$ 270

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

11:30 a.m.-9:28 p.m.

1 stop6h 58m

London

Sat 7/6

6:15 a.m.-10:51 a.m.

1 stop7h 36m

C$ 293

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Fri 30/5

7:25 p.m.-9:18 a.m.

2 stops11h 53m

London

Fri 6/6

6:15 a.m.-11:28 a.m.

1 stop7h 13m

C$ 295

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

11:30 a.m.-9:28 p.m.

1 stop6h 58m

London

Sat 7/6

9:55 a.m.-8:37 p.m.

2 stops13h 42m

C$ 299

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 5/5

8:22 p.m.-7:10 p.m.

2 stops19h 48m

London

Mon 12/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 373

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 10/6

6:05 p.m.-5:14 a.m.

1 stop8h 09m

London

Tue 17/6

6:00 a.m.-12:05 p.m.

1 stop9h 05m

C$ 400

OrlandoLondon

MCO - YXU

MCOYXU

Orlando

Sat 31/5

6:00 a.m.-3:03 p.m.

2 stops9h 03m

London

Sat 7/6

9:55 a.m.-12:45 a.m.

2 stops14h 50m

C$ 435

OrlandoLondon

MCO - YXU

MCOYXU

Orlando

Thu 15/5

7:05 p.m.-3:04 p.m.

2 stops19h 59m

London

Thu 22/5

6:15 a.m.-11:21 a.m.

1 stop5h 06m

C$ 473

OrlandoLondon

MCO - YXU

MCOYXU

Orlando

Fri 30/5

8:15 p.m.-9:18 a.m.

1 stop13h 03m

London

Fri 6/6

6:15 a.m.-11:21 a.m.

1 stop5h 06m

C$ 484

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 41 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, October is the cheapest month in which you can book a flight from USA to London, Ontario (average of C$ 243). Flying from USA to London, Ontario in December is currently the most expensive (average of C$ 478). 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 15 April 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from USA to London, Ontario as you normally would.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London, Ontario ranges from 70.0 - 100.0 mm per month. January is typically the wettest month, when rainfall can reach 100.0 mm. March is typically the driest time to visit London, Ontario when rainfall is around 70.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 20.0 C. Travellers hoping to avoid the cold should look outside of February, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 15 April 2025.
See what other customers who have flown with United Airlines, WestJet and Air Canada from USA to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,658 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,658 reviews
United Airlines
7.4
Good
8,658 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
WestJet
7.2
Good
2,805 reviews
United Airlines
7.4
Good
8,658 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,127 reviews
United Airlines
7.4
Good
8,658 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Flair Airlines
6.0
Okay
239 reviews
United Airlines
7.4
Good
8,658 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • What are the cheapest airlines to fly from USA to London, Ontario one-way?

    C$ 192 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and Flair Airlines, with prices starting from C$ 211 and C$ 339, respectively.

  • What are the most popular routes from USA to London, Ontario?

    The most popular route from USA to London, Ontario is Seattle/Tacoma Intl - London. You may also consider Orlando - 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, October is the cheapest month in which you can book a flight from USA to London, Ontario (average of C$ 243). Flying from USA to London, Ontario in December is currently the most expensive (average of C$ 478). 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

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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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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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