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Cheap flights from London, ON to Washington 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
4 Apr — 11 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 5 March 2026.

Mon 1/65:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Wed 3/67:35 p.m.
SEA
-
YXU
1 stop18h 10m
WestJet
Deal found 4/3C$ 488
Thu 10/123:25 p.m.
YXU
-
SEA
1 stop9h 51m
Air Canada
Mon 14/127:05 p.m.
SEA
-
YXU
2 stops11h 01m
Air Canada
Deal found 1/3C$ 510
Mon 1/63:30 p.m.
YXU
-
SEA
1 stop8h 38m
Air Canada
Wed 3/67:20 p.m.
SEA
-
YXU
2 stops10h 33m
Air Canada
Deal found 4/3C$ 536
Wed 15/48:10 p.m.
YXU
-
SEA
1 stop21h 09m
WestJet
Wed 22/43:10 p.m.
SEA
-
YXU
1 stop12h 25m
WestJet
Deal found 1/3C$ 543
Wed 15/49:25 a.m.
YXU
-
SEA
2 stops12h 35m
United Airlines
Wed 22/410:55 p.m.
SEA
-
YXU
2 stops15h 09m
United Airlines
Deal found 1/3C$ 618
Wed 1/78:40 p.m.
YXU
-
PDX
1 stop20h 10m
WestJet
Sat 4/72:30 p.m.
PDX
-
YXU
1 stop23h 15m
WestJet
Deal found 1/3C$ 623
Thu 16/45:10 a.m.
YXU
-
PDX
2 stops12h 30m
Air Canada
Thu 23/47:05 p.m.
PDX
-
YXU
2 stops10h 39m
Air Canada
Deal found 2/3C$ 642
Mon 13/45:40 p.m.
YXU
-
PDX
2 stops18h 30m
Air Canada
Thu 16/47:05 p.m.
PDX
-
YXU
2 stops10h 39m
Air Canada
Deal found 28/2C$ 653
Fri 1/55:40 a.m.
YXU
-
PDX
2 stops16h 25m
Air Canada
Tue 5/57:45 p.m.
PDX
-
YXU
2 stops10h 08m
Air Canada
Deal found 4/3C$ 674
Wed 1/79:30 a.m.
YXU
-
PDX
2 stops18h 20m
United Airlines
Sat 4/711:40 p.m.
PDX
-
YXU
2 stops19h 00m
United Airlines
Deal found 1/3C$ 692
Sun 8/35:40 p.m.
YXU
-
SEA
1 stop7h 36m
Air Canada
Thu 12/38:00 a.m.
SEA
-
YXU
1 stop10h 21m
Air Canada
Deal found 28/2C$ 778
Sun 8/39:40 a.m.
YXU
-
SEA
2 stops16h 05m
United Airlines
Thu 12/311:59 p.m.
SEA
-
YXU
2 stops18h 22m
United Airlines
Deal found 1/3C$ 828

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 5 March 2026.

Round-trip from

C$ 488

One-way from

C$ 260
WestJet
  • WestJet
  • 1/6-3/6
  • 2 total stops
  • 36h 55m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 5/4
  • 2 total stops
  • 17h 15m 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 5 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

Mon 1/6

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

1 stop18h 45m

Seattle/Tacoma Intl

Wed 3/6

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

1 stop18h 10m

C$ 488

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 1/6

3:30 p.m.-9:08 p.m.

1 stop8h 38m

Seattle/Tacoma Intl

Wed 3/6

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

2 stops10h 33m

C$ 536

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 15/4

9:25 a.m.-7:00 p.m.

2 stops12h 35m

Seattle/Tacoma Intl

Wed 22/4

10:55 p.m.-5:04 p.m.

2 stops15h 09m

C$ 618

LondonPortland

YXU - PDX

YXUPDX

London

Wed 1/7

8:40 p.m.-1:50 p.m.

1 stop20h 10m

Portland

Sat 4/7

2:30 p.m.-4:45 p.m.

1 stop23h 15m

C$ 623

LondonPortland

YXU - PDX

YXUPDX

London

Mon 13/4

5:40 p.m.-9:10 a.m.

2 stops18h 30m

Portland

Thu 16/4

7:05 p.m.-8:44 a.m.

2 stops10h 39m

C$ 653

LondonPortland

YXU - PDX

YXUPDX

London

Fri 1/5

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

2 stops16h 25m

Portland

Tue 5/5

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

2 stops10h 08m

C$ 674

LondonPortland

YXU - PDX

YXUPDX

London

Wed 1/7

9:30 a.m.-12:50 a.m.

2 stops18h 20m

Portland

Sat 4/7

11:40 p.m.-9:40 p.m.

2 stops19h 00m

C$ 692

LondonPortland

YXU - PDX

YXUPDX

London

Thu 16/4

5:10 a.m.-6:07 p.m.

3 stops15h 57m

Portland

Thu 23/4

11:59 p.m.-5:04 p.m.

2 stops14h 05m

C$ 955
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$ 1,047

LondonPortland

YXU - PDX

YXUPDX

London

Wed 1/7

6:10 a.m.-10:43 p.m.

3 stops19h 33m

Portland

Sat 4/7

2:30 p.m.-1:50 p.m.

3 stops20h 20m

C$ 1,521

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/3

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$ 179). 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 5 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
9,389 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

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
9,389 reviews
United Airlines
7.4
Good
9,389 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

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
3,281 reviews
United Airlines
7.4
Good
9,389 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

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
10,776 reviews
United Airlines
7.4
Good
9,389 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

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$ 517, WestJet can have you in State of Washington from London, Ontario in 7h 36m. 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 - Portland, London - Seattle/Tacoma Intl 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$ 179). 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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Alternative routes for London to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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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 5 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 240AverageC$ 388FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 275AverageC$ 292FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 365AverageC$ 446FlexibilityNo 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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