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Cheap flights from the United States to London, ON from C$ 180

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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
4 May — 11 May1
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 29 April 2025.

Round-trip from

C$ 276

One-way from

C$ 180
Air Canada
  • Air Canada
  • 12/6-19/6
  • 5 total stops
  • 29h 09m total
  • USA to London
Search Deals
WestJet
  • WestJet
  • 12/6
  • 1 total stop
  • 19h 09m 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 29 April 2025.

Thu 12/62:55 p.m.SEA - YXU
3 stops15h 23mAir Canada
Thu 19/69:55 a.m.YXU - SEA
2 stops13h 46mAir Canada
Deal found 28/4C$ 276
Thu 12/67:05 a.m.SEA - YXU
1 stop19h 09mMultiple Airlines
Thu 19/66:15 a.m.YXU - SEA
1 stop7h 36mMultiple Airlines
Deal found 28/4C$ 335
Sat 31/511:50 p.m.SEA - YXU
2 stops18h 38mUnited Airlines
Sat 7/69:55 a.m.YXU - SEA
2 stops15h 25mUnited Airlines
Deal found 28/4C$ 402
Thu 15/57:35 a.m.TPA - YXU
2 stops13h 54mUnited Airlines
Sun 18/53:45 p.m.YXU - TPA
2 stops19h 09mUnited Airlines
Deal found 28/4C$ 434
Wed 11/66:30 a.m.MCO - YXU
1 stop14h 58mAir Canada
Wed 18/66:15 a.m.YXU - MCO
1 stop5h 05mAir Canada
Deal found 28/4C$ 474
Wed 11/66:00 a.m.MCO - YXU
2 stops8h 58mUnited Airlines
Wed 18/66:15 a.m.YXU - MCO
2 stops11h 42mUnited Airlines
Deal found 28/4C$ 475
Thu 12/67:05 a.m.SEA - YXU
1 stop19h 09mWestJet
Thu 19/66:00 a.m.YXU - SEA
1 stop9h 58mWestJet
Deal found 28/4C$ 535
Thu 12/68:45 p.m.TPA - YXU
1 stop12h 33mAir Canada
Thu 19/66:15 a.m.YXU - TPA
1 stop4h 48mAir Canada
Deal found 28/4C$ 545
Thu 12/611:00 a.m.EWR - YXU
1 stop3h 58mAir Canada
Thu 19/66:15 a.m.YXU - EWR
1 stop3h 52mAir Canada
Deal found 28/4C$ 631
Thu 12/68:25 p.m.ORD - YXU
1 stop11h 53mAir Canada
Thu 19/66:15 a.m.YXU - ORD
1 stop3h 54mAir Canada
Deal found 28/4C$ 642
Wed 11/65:20 a.m.MCO - YXU
3 stops23h 54mMultiple Airlines
Wed 18/69:45 p.m.YXU - MCO
2 stops21h 56mMultiple Airlines
Deal found 28/4C$ 707
Sun 22/63:50 p.m.LGA - YXU
1 stop5h 37mAir Canada
Sun 29/69:55 a.m.YXU - LGA
1 stop3h 33mAir Canada
Deal found 28/4C$ 712

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 29 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

Thu 12/6

2:55 p.m.-9:18 a.m.

3 stops15h 23m

London

Thu 19/6

9:55 a.m.-8:41 p.m.

2 stops13h 46m

C$ 276

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 12/6

7:05 a.m.-5:14 a.m.

1 stop19h 09m

London

Thu 19/6

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

1 stop7h 36m

C$ 335

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

11:50 p.m.-9:28 p.m.

2 stops18h 38m

London

Sat 7/6

9:55 a.m.-10:20 p.m.

2 stops15h 25m

C$ 402

TampaLondon

TPA - YXU

TPAYXU

Tampa

Thu 15/5

7:35 a.m.-9:29 p.m.

2 stops13h 54m

London

Sun 18/5

3:45 p.m.-10:54 a.m.

2 stops19h 09m

C$ 434

OrlandoLondon

MCO - YXU

MCOYXU

Orlando

Wed 11/6

6:30 a.m.-9:28 p.m.

1 stop14h 58m

London

Wed 18/6

6:15 a.m.-11:20 a.m.

1 stop5h 05m

C$ 474

OrlandoLondon

MCO - YXU

MCOYXU

Orlando

Wed 11/6

6:00 a.m.-2:58 p.m.

2 stops8h 58m

London

Wed 18/6

6:15 a.m.-5:57 p.m.

2 stops11h 42m

C$ 475

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 12/6

7:05 a.m.-5:14 a.m.

1 stop19h 09m

London

Thu 19/6

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

1 stop9h 58m

C$ 535

TampaLondon

TPA - YXU

TPAYXU

Tampa

Thu 12/6

8:45 p.m.-9:18 a.m.

1 stop12h 33m

London

Thu 19/6

6:15 a.m.-11:03 a.m.

1 stop4h 48m

C$ 545

NewarkLondon

EWR - YXU

EWRYXU

Newark

Thu 12/6

11:00 a.m.-2:58 p.m.

1 stop3h 58m

London

Thu 19/6

6:15 a.m.-10:07 a.m.

1 stop3h 52m

C$ 631

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 12/6

8:25 p.m.-9:18 a.m.

1 stop11h 53m

London

Thu 19/6

6:15 a.m.-9:09 a.m.

1 stop3h 54m

C$ 642

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/4

Showing 1-10 of 47 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 29 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 29 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
8,696 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

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
8,696 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

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
2,823 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

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
9,228 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

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$ 180 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from C$ 202 and C$ 346, 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 Chicago O'Hare Intl - London or Newark - 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, 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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