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Cheap flights from London, ON to Washington from C$ 296

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 14/4. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
18 Apr — 25 Apr1
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 19 March 2026.

Thu 30/45:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Thu 7/57:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 16/3C$ 482
Thu 30/45:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Mon 4/57:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 16/3C$ 558
Mon 4/56:10 a.m.
YXU
-
PDX
1 stop10h 40m
WestJet
Fri 8/52:30 p.m.
PDX
-
YXU
1 stop11h 50m
WestJet
Deal found 16/3C$ 582
Mon 13/73:30 p.m.
YXU
-
SEA
1 stop8h 37m
Air Canada
Mon 20/77:20 p.m.
SEA
-
YXU
2 stops13h 25m
Air Canada
Deal found 16/3C$ 658
Thu 30/49:25 a.m.
YXU
-
SEA
1 stop15h 28m
Air Canada
Mon 4/57:20 p.m.
SEA
-
YXU
2 stops10h 33m
Air Canada
Deal found 14/3C$ 665
Mon 4/55:40 a.m.
YXU
-
PDX
2 stops16h 25m
Air Canada
Fri 8/57:45 p.m.
PDX
-
YXU
2 stops10h 08m
Air Canada
Deal found 16/3C$ 689
Mon 4/56:10 a.m.
YXU
-
PDX
1 stop10h 40m
Multiple Airlines
Fri 8/57:45 p.m.
PDX
-
YXU
2 stops10h 08m
Multiple Airlines
Deal found 16/3C$ 711
Thu 30/49:25 a.m.
YXU
-
SEA
1 stop15h 28m
Air Canada
Thu 7/57:20 p.m.
SEA
-
YXU
2 stops13h 23m
Air Canada
Deal found 16/3C$ 713
Thu 30/49:25 a.m.
YXU
-
SEA
2 stops16h 22m
United Airlines
Mon 4/57:05 p.m.
SEA
-
YXU
2 stops19h 28m
United Airlines
Deal found 15/3C$ 717
Fri 1/55:40 a.m.
YXU
-
PDX
2 stops12h 05m
Air Canada
Tue 5/57:45 p.m.
PDX
-
YXU
2 stops10h 08m
Air Canada
Deal found 15/3C$ 752
Fri 1/56:10 a.m.
YXU
-
PDX
1 stop10h 40m
Delta
Tue 5/56:05 p.m.
PDX
-
YXU
2 stops8h 15m
Delta
Deal found 15/3C$ 1,043

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 19 March 2026.

Round-trip from

C$ 482

One-way from

C$ 296
WestJet
  • WestJet
  • 30/4-7/5
  • 2 total stops
  • 25h 30m total
  • London to Washington
Search Deals
Delta
  • Delta
  • 14/4
  • 1 total stop
  • 9h 19m 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 19 March 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

Thu 30/4

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

1 stop18h 45m

Seattle/Tacoma Intl

Thu 7/5

7:35 p.m.-5:20 a.m.

1 stop6h 45m

C$ 482

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

5:55 p.m.-6:45 p.m.

1 stop27h 50m

Seattle/Tacoma Intl

Mon 4/5

7:35 p.m.-5:20 a.m.

1 stop6h 45m

C$ 558

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 13/7

3:30 p.m.-9:07 p.m.

1 stop8h 37m

Seattle/Tacoma Intl

Mon 20/7

7:20 p.m.-11:45 a.m.

2 stops13h 25m

C$ 658

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

9:25 a.m.-9:53 p.m.

1 stop15h 28m

Seattle/Tacoma Intl

Mon 4/5

7:20 p.m.-8:53 a.m.

2 stops10h 33m

C$ 665

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 12/8

3:30 p.m.-9:07 p.m.

1 stop8h 37m

Seattle/Tacoma Intl

Sat 22/8

8:00 a.m.-9:40 p.m.

1 stop10h 40m

C$ 665

LondonPortland

YXU - PDX

YXUPDX

London

Mon 4/5

5:40 a.m.-7:05 p.m.

2 stops16h 25m

Portland

Fri 8/5

7:45 p.m.-8:53 a.m.

2 stops10h 08m

C$ 689

LondonPortland

YXU - PDX

YXUPDX

London

Mon 4/5

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Fri 8/5

7:45 p.m.-8:53 a.m.

2 stops10h 08m

C$ 711

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

9:25 a.m.-10:47 p.m.

2 stops16h 22m

Seattle/Tacoma Intl

Mon 4/5

7:25 a.m.-9:38 p.m.

2 stops11h 13m

C$ 717

LondonPortland

YXU - PDX

YXUPDX

London

Fri 1/5

5:40 a.m.-2:45 p.m.

2 stops12h 05m

Portland

Tue 5/5

7:45 p.m.-8:53 a.m.

2 stops10h 08m

C$ 752
Quickest round-trip

LondonPortland

YXU - PDX

YXUPDX

London

Fri 1/5

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Tue 5/5

6:05 p.m.-5:20 a.m.

2 stops8h 15m

C$ 1,043

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/3

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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

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

Currently, December is the cheapest month in which you can book a flight from London, Ontario to State of Washington (average of C$ 180). Flying from London, Ontario to State of Washington in July is currently the most expensive (average of C$ 323). 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 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 19 March 2026.
Check out reviews from past customers who have flown with United Airlines,WestJet, andAir Canada 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.
United Airlines
7.4
Good
9,440 reviews
Check prices

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,440 reviews
United Airlines
7.4
Good
9,440 reviews
Check prices

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,297 reviews
United Airlines
7.4
Good
9,440 reviews
Check prices

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,815 reviews
United Airlines
7.4
Good
9,440 reviews
Check prices

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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$ 658, WestJet can have you in State of Washington from London, Ontario in 8h 37m. 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.

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

    Currently, December is the cheapest month in which you can book a flight from London, Ontario to State of Washington (average of C$ 180). Flying from London, Ontario to State of Washington in July is currently the most expensive (average of C$ 323). 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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Top 3 airlines flying from London to Washington

Discover the top 3 airlines 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 19 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 240AverageC$ 386FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 276AverageC$ 293FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 366AverageC$ 447FlexibilityNo 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 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!

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