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Cheap flights from London, ON to the United States from C$ 221

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 29/1. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LAX
7 Feb — 14 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to USA

Keep the following information in mind while searching for London to USA flight deals. Data was last updated 8 January 2026.

Round-trip from

C$ 263

One-way from

C$ 221

Popular in

December

Cheapest in

March

Average price

C$ 599
WestJet
  • WestJet
  • 10/4-27/4
  • 2 total stops
  • 18h 51m total
  • London to USA
Search Deals
Air Canada
  • Air Canada
  • 29/1
  • 1 total stop
  • 8h 44m total
  • London to USA
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (C$ 163 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find flight deals from London to USA

Enter your travel dates to find the best prices.

Cheapest flights from London to USA
Explore the most affordable flight options available from London to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 January 2026.

Fri 10/47:30 a.m.YXU - SEA
1 stop9h 49mWestJet
Mon 27/47:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 6/1C$ 263
Fri 27/37:30 a.m.YXU - SEA
1 stop9h 49mWestJet
Fri 8/57:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 7/1C$ 274
Tue 14/48:00 a.m.YXU - SEA
1 stop9h 19mWestJet
Wed 27/57:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 7/1C$ 301
Fri 3/47:30 a.m.YXU - SEA
1 stop9h 49mWestJet
Tue 12/57:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 7/1C$ 304
Fri 27/25:40 p.m.YXU - SEA
1 stop7h 36mAir Canada
Thu 5/38:00 p.m.SEA - YXU
2 stops9h 46mAir Canada
Deal found 6/1C$ 308
Wed 8/48:10 p.m.YXU - SEA
1 stop21h 09mWestJet
Wed 20/57:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 7/1C$ 312
Wed 8/48:10 p.m.YXU - SEA
1 stop21h 09mWestJet
Wed 13/57:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 6/1C$ 314
Fri 3/47:30 a.m.YXU - SEA
1 stop9h 49mWestJet
Sun 17/57:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 6/1C$ 315
Tue 7/48:10 p.m.YXU - SEA
1 stop21h 09mWestJet
Mon 27/47:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 6/1C$ 326
Fri 27/37:30 a.m.YXU - SEA
1 stop9h 49mWestJet
Sun 3/57:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 7/1C$ 329
Tue 7/48:10 p.m.YXU - SEA
1 stop21h 09mWestJet
Thu 14/57:05 a.m.SEA - YXU
1 stop9h 02mWestJet
Deal found 6/1C$ 337
Tue 7/76:00 a.m.YXU - SFO
1 stop8h 54mWestJet
Thu 30/77:30 a.m.SFO - YXU
1 stop8h 37mWestJet
Deal found 8/1C$ 354

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to USA 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 8 January 2026.
Use the filters below to find and compare flights from London to the United States that are best for you.

Fly from

London

Fly to

USA

Route

Depart

Return

Price

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 27/3

7:30 a.m.-2:19 p.m.

1 stop9h 49m

Seattle/Tacoma Intl

Sat 16/5

7:05 a.m.-7:07 p.m.

1 stop9h 02m

C$ 329

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 8/3

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

1 stop7h 36m

Seattle/Tacoma Intl

Wed 11/3

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

2 stops9h 46m

C$ 340

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 7/7

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Thu 30/7

2:45 p.m.-5:12 a.m.

2 stops11h 27m

C$ 372

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 29/1

5:10 a.m.-3:35 p.m.

2 stops13h 25m

San Francisco

Mon 2/2

6:00 p.m.-8:46 a.m.

2 stops11h 46m

C$ 376

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 5/4

8:10 p.m.-2:19 p.m.

1 stop21h 09m

Seattle/Tacoma Intl

Tue 28/4

7:05 a.m.-7:07 p.m.

1 stop9h 02m

C$ 377

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 25/3

8:10 p.m.-2:19 p.m.

1 stop21h 09m

Seattle/Tacoma Intl

Fri 15/5

7:05 a.m.-7:07 p.m.

1 stop9h 02m

C$ 387

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 22/3

8:10 p.m.-2:19 p.m.

1 stop21h 09m

Seattle/Tacoma Intl

Tue 12/5

7:05 a.m.-7:07 p.m.

1 stop9h 02m

C$ 387

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 25/3

8:10 p.m.-2:19 p.m.

1 stop21h 09m

Seattle/Tacoma Intl

Sun 10/5

7:05 a.m.-7:07 p.m.

1 stop9h 02m

C$ 387

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 8/4

8:10 p.m.-2:19 p.m.

1 stop21h 09m

Seattle/Tacoma Intl

Mon 11/5

7:05 a.m.-7:07 p.m.

1 stop9h 02m

C$ 387

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 9/4

8:10 p.m.-2:19 p.m.

1 stop21h 09m

Seattle/Tacoma Intl

Fri 1/5

7:05 a.m.-7:07 p.m.

1 stop9h 02m

C$ 387

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/1

Showing 1-10 of 60 results
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Best time to book a flight from London to USA

Have a flexible travel schedule? Discover the best time to fly to USA from London 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 London to the United States

What is the cheapest month to book a flight from London, Ontario to USA?

Currently, April is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 90). Flying from London, Ontario to USA in December is currently the most expensive (average of C$ 200). 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.

Reviews of airlines servicing USA

Get insights into the airlines that provide service to USA. 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 USA. Reviews last updated 8 January 2026.
Check out reviews from past customers who have flown with United Airlines,WestJet, andAir Canada from London to the United States to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,142 reviews
Check prices

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,142 reviews
United Airlines
7.4
Good
9,142 reviews
Check prices

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
WestJet
7.2
Good
3,235 reviews
United Airlines
7.4
Good
9,142 reviews
Check prices

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Air Canada
7.1
Good
10,603 reviews
United Airlines
7.4
Good
9,142 reviews
Check prices

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Flair Airlines
6.0
Okay
259 reviews
United Airlines
7.4
Good
9,142 reviews
Check prices

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

Find useful and relevant information for your journey from London to USA. 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 from for flights from London to United States?

    Located just 8.6 km from the city centre, London (YXU) is the airport most travellers will use when flying to United States from London.

  • How long is the flight from London, Ontario to USA?

    Departing from London, Ontario to USA will take you 7h 36m. London, Ontario and USA are separated by a distance of 3219 km. This flight may include one or multiple stops.

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

    The cheapest airline one-way is Flair Airlines, with whom users have recently found tickets for as low as C$ 102. However, be on the lookout for offers from Air Canada and WestJet, as they are both options that can get you from London, Ontario to USA for a low price.

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

    The most popular route from London, Ontario to USA is London - Seattle/Tacoma Intl. You may also consider London - Orlando or London - San Francisco.

  • Can I find deals for flights from London to USA that include hotel bookings?

    Yes. In addition to deals on London to USA flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from London to USA?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to USA.

  • Can I find deals for business class flights from London to USA?

    Yes. Cheapflights offers flight deals from London to USA 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 London, Ontario to USA?

    Currently, April is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 90). Flying from London, Ontario to USA in December is currently the most expensive (average of C$ 200). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to USA

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from London to USA

Discover the top 4 airlines that operate flights from London to USA. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 8 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 161AverageC$ 229FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 179AverageC$ 502FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 242AverageC$ 401FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 305AverageC$ 680FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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 London to USA?

Cheapflights helps you search for flights from London to USA via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from London to USA?

Cheapflights simply makes it quick and affordable to book flights from London to USA 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 London to USA with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to USA flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to USA become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to USA from London today and book when prices fit your budget.

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