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Cheap flights from Washington to London, ON from C$ 260

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YXU
5 Aug — 12 Aug1
1 adult

Cheap flight deals from Washington to London

Keep the following information in mind while searching for Washington to London flight deals. Data was last updated 31 July 2025.

Round-trip from

C$ 502

One-way from

C$ 260
WestJet
  • WestJet
  • 26/9-30/9
  • 3 total stops
  • 22h 56m total
  • Washington to London
Search Deals
WestJet
  • WestJet
  • 6/10
  • 1 total stop
  • 9h 02m total
  • Washington to London
Search Deals

Find flight deals from Washington to London

Cheapest flights from Washington to London
Explore the most affordable flight options available from Washington to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2025.

Fri 26/91:15 p.m.SEA - YXU
2 stops12h 57mWestJet
Tue 30/96:00 a.m.YXU - SEA
1 stop9h 59mWestJet
Deal found 30/7C$ 502
Sun 14/97:15 a.m.SEA - YXU
2 stops11h 14mAir Canada
Sun 21/96:10 a.m.YXU - SEA
1 stop7h 49mAir Canada
Deal found 31/7C$ 569
Sun 14/95:30 a.m.SEA - YXU
3 stops20h 42mMultiple Airlines
Sun 21/96:10 a.m.YXU - SEA
2 stops15h 26mMultiple Airlines
Deal found 31/7C$ 627
Mon 15/97:34 p.m.SEA - YXU
2 stops10h 45mUnited Airlines
Mon 22/96:10 a.m.YXU - SEA
1 stop7h 49mUnited Airlines
Deal found 31/7C$ 859

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 31 July 2025.
Use the filters below to find and compare flights from Washington to London that are best for you.

Fly from

Washington

Fly to

London

Route

Depart

Return

Price

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 26/9

1:15 p.m.-5:12 a.m.

2 stops12h 57m

London

Tue 30/9

6:00 a.m.-12:59 p.m.

1 stop9h 59m

C$ 502

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 14/9

7:15 a.m.-9:29 p.m.

2 stops11h 14m

London

Sun 21/9

6:10 a.m.-10:59 a.m.

1 stop7h 49m

C$ 569

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 14/9

5:30 a.m.-5:12 a.m.

3 stops20h 42m

London

Sun 21/9

6:10 a.m.-6:36 p.m.

2 stops15h 26m

C$ 627

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 15/9

7:34 p.m.-9:19 a.m.

2 stops10h 45m

London

Mon 22/9

6:10 a.m.-10:59 a.m.

1 stop7h 49m

C$ 859

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 6/10

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

1 stop9h 02m

C$ 260

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 6/10

7:15 p.m.-9:17 a.m.

2 stops11h 02m

C$ 321

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 6/10

5:00 a.m.-9:27 p.m.

3 stops13h 27m

C$ 2,256

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/7

Best time to book a flight from Washington to London

Have a flexible travel schedule? Discover the best time to fly to London from Washington 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 Washington to London

What is the cheapest month to book a flight from State of Washington to London, Ontario?

Currently, October is the cheapest month in which you can book a flight from State of Washington to London, Ontario (average of C$ 243). Flying from State of Washington 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.

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 31 July 2025.
Read through reviews of airlines operating flights from Washington to London, such as United Airlines,WestJet, andAir Canada. 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
8,900 reviews
Check prices

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

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
8,900 reviews
United Airlines
7.4
Good
8,900 reviews
Check prices

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

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
2,978 reviews
United Airlines
7.4
Good
8,900 reviews
Check prices

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

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
7.1
Good
9,851 reviews
United Airlines
7.4
Good
8,900 reviews
Check prices

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

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 Washington 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 Washington?

    For a flight from Washington to London, you will be flying into London. London (YXU) is just 8.6 km from the centre of the city.

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

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as C$ 260. However, be on the lookout for offers from Air Canada and United Airlines, as they are both options that can get you from State of Washington to London, Ontario for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to London, Ontario?

    Currently, October is the cheapest month in which you can book a flight from State of Washington to London, Ontario (average of C$ 243). Flying from State of Washington 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend
Port Stanley

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