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Cheap flights from London, ON to Washington from C$ 199

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 28/2. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
13 Feb — 20 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Washington

Keep the following information in mind while searching for London to Washington flight deals. Data was last updated 14 January 2026.

Round-trip from

C$ 340

One-way from

C$ 199

Popular in

March

Cheapest in

April

Average price

C$ 573
Air Canada
  • Air Canada
  • 8/3-11/3
  • 3 total stops
  • 17h 22m total
  • London to Washington
Search Deals
Air Canada
  • Air Canada
  • 28/2
  • 1 total stop
  • 7h 36m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 164 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease (C$ 64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find 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 14 January 2026.

Sun 8/35:40 p.m.
YXU
-
SEA
1 stop7h 36m
Air Canada
Wed 11/38:00 p.m.
SEA
-
YXU
2 stops9h 46m
Air Canada
Deal found 12/1C$ 340
Sat 2/58:00 p.m.
YXU
-
SEA
1 stop20h 08m
WestJet
Sat 9/57:05 a.m.
SEA
-
YXU
1 stop9h 02m
WestJet
Deal found 14/1C$ 372
Fri 20/25:40 p.m.
YXU
-
SEA
1 stop7h 36m
Air Canada
Thu 26/29:55 a.m.
SEA
-
YXU
2 stops19h 51m
Air Canada
Deal found 14/1C$ 385
Fri 6/25:40 p.m.
YXU
-
SEA
1 stop7h 36m
United Airlines
Fri 13/211:59 p.m.
SEA
-
YXU
2 stops14h 06m
United Airlines
Deal found 13/1C$ 421
Fri 20/29:25 a.m.
YXU
-
SEA
2 stops12h 38m
United Airlines
Thu 26/212:43 p.m.
SEA
-
YXU
3 stops25h 22m
United Airlines
Deal found 14/1C$ 483
Wed 12/86:00 a.m.
YXU
-
PDX
1 stop10h 20m
Multiple Airlines
Sun 16/87:04 a.m.
PDX
-
YXU
2 stops19h 08m
Multiple Airlines
Deal found 13/1C$ 752
Mon 2/39:25 a.m.
YXU
-
PDX
2 stops12h 05m
Air Canada
Wed 4/37:05 p.m.
PDX
-
YXU
2 stops10h 41m
Air Canada
Deal found 11/1C$ 764
Wed 12/88:00 p.m.
YXU
-
PDX
1 stop20h 20m
WestJet
Sun 16/82:00 p.m.
PDX
-
YXU
1 stop12h 12m
WestJet
Deal found 13/1C$ 776
Sat 14/25:40 p.m.
YXU
-
PDX
2 stops18h 35m
Air Canada
Sun 22/27:05 p.m.
PDX
-
YXU
2 stops10h 41m
Air Canada
Deal found 12/1C$ 837
Fri 13/25:10 a.m.
YXU
-
PDX
2 stops12h 30m
Air Canada
Sun 22/27:05 p.m.
PDX
-
YXU
2 stops10h 41m
Air Canada
Deal found 12/1C$ 962
Sat 14/29:25 a.m.
YXU
-
PDX
3 stops30h 13m
United Airlines
Sun 22/210:38 p.m.
PDX
-
YXU
2 stops15h 27m
United Airlines
Deal found 12/1C$ 1,163
Fri 13/25:40 p.m.
YXU
-
PDX
3 stops32h 16m
United Airlines
Sun 22/210:38 p.m.
PDX
-
YXU
2 stops15h 27m
United Airlines
Deal found 12/1C$ 1,170

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 14 January 2026.
Use the filters below to find and compare flights from London to Washington that are best for you.

Fly from

London

Fly to

Washington

Route

Depart

Return

Price

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$ 342

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 2/5

8:00 p.m.-1:08 p.m.

1 stop20h 08m

Seattle/Tacoma Intl

Sat 9/5

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

1 stop9h 02m

C$ 372

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 20/2

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

1 stop7h 36m

Seattle/Tacoma Intl

Thu 26/2

9:55 a.m.-8:46 a.m.

2 stops19h 51m

C$ 385

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 6/2

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

1 stop7h 36m

Seattle/Tacoma Intl

Fri 13/2

11:59 p.m.-5:05 p.m.

2 stops14h 06m

C$ 421

LondonPortland

YXU - PDX

YXUPDX

London

Mon 2/3

9:25 a.m.-6:30 p.m.

2 stops12h 05m

Portland

Wed 4/3

7:05 p.m.-8:46 a.m.

2 stops10h 41m

C$ 764

LondonPortland

YXU - PDX

YXUPDX

London

Sat 14/2

5:40 p.m.-9:15 a.m.

2 stops18h 35m

Portland

Sun 22/2

7:05 p.m.-8:46 a.m.

2 stops10h 41m

C$ 837

LondonPortland

YXU - PDX

YXUPDX

London

Fri 13/2

5:10 a.m.-2:40 p.m.

2 stops12h 30m

Portland

Sun 22/2

7:05 p.m.-8:46 a.m.

2 stops10h 41m

C$ 962

LondonPortland

YXU - PDX

YXUPDX

London

Sat 14/2

9:25 a.m.-12:38 p.m.

3 stops30h 13m

Portland

Sun 22/2

10:38 p.m.-5:05 p.m.

2 stops15h 27m

C$ 1,163

LondonPortland

YXU - PDX

YXUPDX

London

Fri 13/2

5:40 p.m.-10:56 p.m.

3 stops32h 16m

Portland

Sun 22/2

10:38 p.m.-5:05 p.m.

2 stops15h 27m

C$ 1,170

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 28/2

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

1 stop7h 36m

C$ 199

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/1

Showing 1-10 of 12 results
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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$ 182). Flying from London, Ontario to State of Washington in August is currently the most expensive (average of C$ 310). 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 14 January 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
9,156 reviews
Check prices

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,156 reviews
United Airlines
7.4
Good
9,156 reviews
Check prices

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
WestJet
7.2
Good
3,240 reviews
United Airlines
7.4
Good
9,156 reviews
Check prices

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Air Canada
7.1
Good
10,619 reviews
United Airlines
7.4
Good
9,156 reviews
Check prices

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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$ 342, Air Canada 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 - 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$ 182). Flying from London, Ontario to State of Washington in August is currently the most expensive (average of C$ 310). 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 14 January 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 242AverageC$ 417FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 279AverageC$ 297FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 371AverageC$ 420FlexibilityNo 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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