Find flights
When to book
Airlines
FAQs

Cheap flights from London, ON to Washington from C$ 371

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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
8 Jul — 15 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Washington

Enter your travel dates to find the best prices.

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

Mi 22/75:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Mi 29/77:00 a.m.
SEA
-
YXU
1 stop19h 20m
WestJet
Deal found 7/6C$ 546
Di 18/85:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Fr 21/87:35 p.m.
SEA
-
YXU
1 stop18h 10m
WestJet
Deal found 5/6C$ 608
So 19/75:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
So 26/77:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 4/6C$ 620
Mi 7/106:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Sa 10/107:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 4/6C$ 640
Mi 24/65:55 p.m.
YXU
-
SEA
1 stop30h 05m
WestJet
Sa 11/77:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 6/6C$ 684
Mi 24/65:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Fr 17/710:30 a.m.
SEA
-
YXU
1 stop15h 50m
WestJet
Deal found 6/6C$ 743
Mi 7/103:30 p.m.
YXU
-
SEA
1 stop8h 34m
Air Canada
Sa 10/107:20 p.m.
SEA
-
YXU
2 stops11h 00m
Air Canada
Deal found 6/6C$ 764
Sa 3/1010:05 a.m.
YXU
-
PDX
2 stops12h 01m
Air Canada
Di 6/103:30 p.m.
PDX
-
YXU
2 stops14h 50m
Air Canada
Deal found 6/6C$ 913
Sa 3/105:40 a.m.
YXU
-
PDX
3 stops15h 35m
United Airlines
Di 6/107:00 a.m.
PDX
-
YXU
2 stops11h 40m
United Airlines
Deal found 4/6C$ 995

Find flight deals from London to Washington

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

Round-trip from

C$ 546

One-way from

C$ 371
WestJet
  • WestJet
  • 22/7-29/7
  • 2 total stops
  • 47h 10m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 9/11
  • 1 total stop
  • 20h 20m total
  • London to Washington
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Washington 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 Juni 2026.
Use the filters below to find and compare flights from London to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSeattle

YXU - SEA

YXUSEA

London

Di 18/8

5:55 p.m.-9:40 a.m.

1 stop18h 45m

Seattle/Tacoma Intl

Fr 21/8

7:35 p.m.-4:45 p.m.

1 stop18h 10m

C$ 608

LondonSeattle

YXU - SEA

YXUSEA

London

Mi 7/10

6:10 a.m.-6:45 p.m.

1 stop15h 35m

Seattle/Tacoma Intl

Sa 10/10

10:30 a.m.-5:20 a.m.

1 stop15h 50m

C$ 701
Quickest round-trip

LondonSeattle

YXU - SEA

YXUSEA

London

Mi 7/10

5:40 a.m.-2:22 p.m.

2 stops11h 42m

Seattle/Tacoma Intl

Sa 10/10

5:40 a.m.-9:40 p.m.

2 stops13h 00m

C$ 764

LondonSeattle

YXU - SEA

YXUSEA

London

Mi 22/7

10:05 a.m.-8:46 p.m.

2 stops13h 41m

Seattle/Tacoma Intl

Mi 29/7

5:20 p.m.-9:17 a.m.

2 stops12h 57m

C$ 877

LondonPortland

YXU - PDX

YXUPDX

London

Sa 3/10

10:05 a.m.-7:06 p.m.

2 stops12h 01m

Portland

Di 6/10

3:30 p.m.-9:20 a.m.

2 stops14h 50m

C$ 913

LondonPortland

YXU - PDX

YXUPDX

London

Sa 3/10

5:40 a.m.-6:15 p.m.

3 stops15h 35m

Portland

Di 6/10

7:00 a.m.-9:40 p.m.

2 stops11h 40m

C$ 995
Cheapest one-way

LondonSeattle

YXU - SEA

YXUSEA

London

Mo 20/7

5:55 p.m.-9:40 a.m.

1 stop18h 45m

C$ 381
Quickest one-way

LondonSeattle

YXU - SEA

YXUSEA

London

Sa 11/7

10:05 a.m.-7:06 p.m.

2 stops12h 01m

C$ 474

LondonSeattle

YXU - SEA

YXUSEA

London

Mi 11/11

5:45 a.m.-9:05 p.m.

2 stops18h 20m

C$ 474

LondonSeattle

YXU - SEA

YXUSEA

London

Mo 20/7

6:20 p.m.-9:40 a.m.

2 stops18h 20m

C$ 474

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/6

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Best time to book a flight from London to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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 Washington
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated 8 Juni 2026.
Check out reviews from past customers who have flown with WestJet from London to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
WestJet
7.2
Good
3,354 reviews
Check prices

Overall

7.2

Food

6.2

Boarding

7.4

Entertainment

6.1

Crew

7.9

Comfort

7.0

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
WestJet
7.2
Good
3,354 reviews
WestJet
7.2
Good
3,354 reviews
Check prices

Overall

7.2

Food

6.2

Boarding

7.4

Entertainment

6.1

Crew

7.9

Comfort

7.0

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

Related info for your journey

Find useful and relevant information for your journey from London to Washington. 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 Washington?

    Most people fly from London (YXU) if they book a flight from London to Washington. London is conveniently located just 8.6 km from London’s city centre.

  • How long is the flight from London, Ontario to State of Washington?

    For as low as C$ 764, WestJet can have you in State of Washington from London, Ontario in 11h 42m. The distance between London, Ontario and State of Washington is about 3219 km. This flight may include one or multiple stops.

  • What are the most popular routes from London, Ontario to State of Washington?

    The most popular flight routes from London, Ontario to State of Washington are London - Seattle/Tacoma Intl, London - Portland and London - Wenatchee Pangborn Field.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Newark flights
Toronto Island to Newark flights
Pearson Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pearson Intl to Los Angeles flights
Pearson Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Newark flights
Toronto Island to LaGuardia flights
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to Dallas/Fort Worth flights
Pierre Elliott Trudeau Intl to Miami flights
Pearson Intl to Las Vegas flights
Pearson Intl to Orlando flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pearson Intl to Reagan-National flights
Pearson Intl to O'Hare Intl flights
Pearson Intl to Seattle flights
Pearson Intl to Miami flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Hobby flights
Hamilton to Newark flights
Pearson Intl to Dulles Intl flights
Pearson Intl to San Francisco flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to Nashville flights
Pearson Intl to Midway flights
Pierre Elliott Trudeau Intl to Orlando flights
Pearson Intl to George Bush Intcntl flights
Pearson Intl to Boston flights
Toronto Island to O'Hare Intl flights
Pierre Elliott Trudeau Intl to Nashville flights
Toronto Island to Dulles Intl flights
Pearson Intl to Tampa flights
Pearson Intl to Atlanta flights
Pierre Elliott Trudeau Intl to Boston flights
Pearson Intl to San Diego flights
Pearson Intl to Ontario flights
Toronto Island to Midway flights
Toronto Island to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Toronto Island to Orlando flights
Pierre Elliott Trudeau Intl to Atlanta flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Toronto Island to Las Vegas flights
Toronto Island to Los Angeles flights
Pierre Elliott Trudeau Intl to San Francisco flights
Ottawa to Newark flights
Toronto Island to Boston flights
Pearson Intl to Philadelphia flights
Toronto Island to Miami flights

Top airline flying from London to Washington

Discover the top airline that operate flights from London to Washington. 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 Juni 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 274AverageC$ 419FlexibilityNo cancel feeOn-time60%
Search WestJet 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 Washington?

Deals for London to Washington 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 London to Washington?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Washington for you. Better yet — we are completely free to use.

Can Cheapflights find flights from London to Washington with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Washington, users can toggle the no change fees filter when performing a flight search.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.