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Cheap flights from London, ON to Washington from C$ 205

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
24 Jan — 31 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Washington

Enter your travel dates to find the best prices.

Best flights from London to Washington
Discover carefully curated flight deals from London to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 25 December 2025.

Tue 3/35:10 a.m.YXU - SEA
2 stops12h 51mAir Canada
Thu 5/35:50 a.m.SEA - YXU
2 stops12h 31mAir Canada
Deal found 23/12C$ 334
Tue 3/35:40 p.m.YXU - SEA
1 stop7h 36mUnited Airlines
Thu 5/35:00 a.m.SEA - YXU
2 stops9h 05mUnited Airlines
Deal found 23/12C$ 334
Tue 3/38:10 p.m.YXU - SEA
1 stop21h 09mWestJet
Thu 5/33:10 p.m.SEA - YXU
1 stop12h 25mWestJet
Deal found 22/12C$ 539
Wed 7/15:40 p.m.YXU - SEA
1 stop7h 36mUnited Airlines
Sat 10/15:00 a.m.SEA - YXU
2 stops9h 05mUnited Airlines
Deal found 25/12C$ 522
Thu 15/15:10 a.m.YXU - PDX
2 stops12h 30mAir Canada
Mon 19/17:00 p.m.PDX - YXU
2 stops10h 46mAir Canada
Deal found 23/12C$ 725
Sat 18/45:10 a.m.YXU - PDX
2 stops12h 30mAir Canada
Tue 21/47:05 p.m.PDX - YXU
2 stops10h 38mAir Canada
Deal found 24/12C$ 767
Sat 18/45:10 a.m.YXU - PDX
3 stops15h 58mUnited Airlines
Tue 21/45:00 a.m.PDX - YXU
2 stops13h 18mUnited Airlines
Deal found 24/12C$ 1,489

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 25 December 2025.

Round-trip from

C$ 334

One-way from

C$ 205
Air Canada
  • Air Canada
  • 3/3-5/3
  • 4 total stops
  • 25h 22m total
  • London to Washington
Search Deals
Air Canada
  • Air Canada
  • 6/2
  • 1 total stop
  • 7h 36m 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 25 December 2025.
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

Tue 3/3

5:10 a.m.-3:01 p.m.

2 stops12h 51m

Seattle/Tacoma Intl

Thu 5/3

5:50 a.m.-9:21 p.m.

2 stops12h 31m

C$ 334

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 3/3

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

1 stop7h 36m

Seattle/Tacoma Intl

Thu 5/3

5:00 a.m.-5:05 p.m.

2 stops9h 05m

C$ 334

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 7/1

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

1 stop7h 36m

Seattle/Tacoma Intl

Sat 10/1

5:00 a.m.-5:05 p.m.

2 stops9h 05m

C$ 522

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 3/3

8:10 p.m.-2:19 p.m.

1 stop21h 09m

Seattle/Tacoma Intl

Thu 5/3

3:10 p.m.-6:35 a.m.

1 stop12h 25m

C$ 539

LondonPortland

YXU - PDX

YXUPDX

London

Thu 15/1

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

2 stops12h 30m

Portland

Mon 19/1

7:00 p.m.-8:46 a.m.

2 stops10h 46m

C$ 725

LondonPortland

YXU - PDX

YXUPDX

London

Sat 18/4

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

2 stops12h 30m

Portland

Tue 21/4

7:05 p.m.-8:43 a.m.

2 stops10h 38m

C$ 767

LondonPortland

YXU - PDX

YXUPDX

London

Sat 18/4

5:10 a.m.-6:08 p.m.

3 stops15h 58m

Portland

Tue 21/4

5:00 a.m.-9:18 p.m.

2 stops13h 18m

C$ 1,489

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 6/2

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

1 stop7h 36m

C$ 205

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 6/2

9:25 a.m.-10:43 p.m.

3 stops16h 18m

C$ 254

LondonPullman

YXU - PUW

YXUPUW

London

Sat 7/2

5:05 p.m.-12:15 a.m.

3 stops34h 10m

C$ 1,484

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/12

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 June is currently the most expensive (average of C$ 341). 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 25 December 2025.
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
9,114 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,114 reviews
United Airlines
7.4
Good
9,114 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
WestJet
7.2
Good
3,216 reviews
United Airlines
7.4
Good
9,114 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Air Canada
7.1
Good
10,555 reviews
United Airlines
7.4
Good
9,114 reviews
Check prices

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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$ 334, 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 - 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 June is currently the most expensive (average of C$ 341). 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 25 December 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 238AverageC$ 411FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 275AverageC$ 292FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 365AverageC$ 414FlexibilityNo 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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