Find flights
When to book
Airlines
FAQs

Cheap flights from London, ON to Washington from C$ 222

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
23 Aug — 30 Aug1
1 adult

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 18 August 2025.

Round-trip from

C$ 525

One-way from

C$ 222
17/9-24/9
  • 17/9-24/9
  • 3 total stops
  • 30h 29m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 1/10
  • 1 total stop
  • 26h 14m total
  • London to Washington
Search Deals

Find flight deals from London to Washington

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 18 August 2025.

Wed 17/96:00 a.m.YXU - SEA
1 stop17h 29mMultiple Airlines
Wed 24/91:12 p.m.SEA - YXU
2 stops13h 00mMultiple Airlines
Deal found 18/8C$ 525
Fri 3/106:15 a.m.YXU - SEA
1 stop7h 44mAir Canada
Sat 18/107:15 p.m.SEA - YXU
2 stops11h 02mAir Canada
Deal found 18/8C$ 555
Wed 17/96:10 a.m.YXU - SEA
2 stops11h 06mAir Canada
Wed 24/97:15 p.m.SEA - YXU
2 stops11h 04mAir Canada
Deal found 18/8C$ 562
Sun 7/128:00 p.m.YXU - SEA
2 stops17h 23mWestJet
Mon 29/123:10 p.m.SEA - YXU
1 stop12h 34mWestJet
Deal found 17/8C$ 573
Mon 8/128:00 p.m.YXU - SEA
1 stop21h 20mWestJet
Sun 28/123:10 p.m.SEA - YXU
1 stop12h 34mWestJet
Deal found 17/8C$ 586
Sun 7/125:45 a.m.YXU - SEA
2 stops11h 41mAir Canada
Thu 25/125:50 a.m.SEA - YXU
2 stops12h 31mAir Canada
Deal found 17/8C$ 605
Sun 7/128:00 p.m.YXU - SEA
2 stops17h 23mWestJet
Sun 28/123:10 p.m.SEA - YXU
1 stop12h 34mWestJet
Deal found 17/8C$ 616
Fri 5/128:00 p.m.YXU - SEA
1 stop21h 38mWestJet
Wed 31/123:10 p.m.SEA - YXU
1 stop12h 34mWestJet
Deal found 17/8C$ 627
Wed 10/128:00 p.m.YXU - SEA
1 stop21h 20mWestJet
Wed 31/123:10 p.m.SEA - YXU
1 stop12h 34mWestJet
Deal found 17/8C$ 642
Sun 7/125:45 a.m.YXU - SEA
2 stops11h 41mAir Canada
Tue 30/128:00 p.m.SEA - YXU
2 stops9h 46mAir Canada
Deal found 17/8C$ 648
Fri 5/125:40 p.m.YXU - SEA
2 stops18h 51mAir Canada
Wed 31/128:00 p.m.SEA - YXU
2 stops9h 46mAir Canada
Deal found 17/8C$ 649

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 18 August 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

Wed 17/9

6:00 a.m.-8:29 p.m.

1 stop17h 29m

Seattle/Tacoma Intl

Wed 24/9

1:12 p.m.-5:12 a.m.

2 stops13h 00m

C$ 525

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 3/10

6:15 a.m.-10:59 a.m.

1 stop7h 44m

Seattle/Tacoma Intl

Sat 18/10

7:15 p.m.-9:17 a.m.

2 stops11h 02m

C$ 555

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 3/10

8:00 p.m.-7:14 p.m.

1 stop26h 14m

Seattle/Tacoma Intl

Sat 18/10

8:40 a.m.-7:07 p.m.

1 stop7h 27m

C$ 555

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 17/9

6:10 a.m.-2:16 p.m.

2 stops11h 06m

Seattle/Tacoma Intl

Wed 24/9

7:15 p.m.-9:19 a.m.

2 stops11h 04m

C$ 562

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 8/12

8:00 p.m.-2:20 p.m.

1 stop21h 20m

Seattle/Tacoma Intl

Mon 29/12

3:10 p.m.-6:44 a.m.

1 stop12h 34m

C$ 573

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 7/12

8:00 p.m.-10:23 a.m.

2 stops17h 23m

Seattle/Tacoma Intl

Mon 29/12

3:10 p.m.-6:44 a.m.

1 stop12h 34m

C$ 573

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 8/12

8:00 p.m.-2:20 p.m.

1 stop21h 20m

Seattle/Tacoma Intl

Sun 28/12

3:10 p.m.-6:44 a.m.

1 stop12h 34m

C$ 586

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 10/12

5:45 a.m.-2:26 p.m.

2 stops11h 41m

Seattle/Tacoma Intl

Thu 25/12

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

2 stops12h 31m

C$ 605

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 7/12

5:45 a.m.-2:26 p.m.

2 stops11h 41m

Seattle/Tacoma Intl

Thu 25/12

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

2 stops12h 31m

C$ 605

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 9/12

5:45 a.m.-2:26 p.m.

2 stops11h 41m

Seattle/Tacoma Intl

Thu 25/12

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

2 stops12h 31m

C$ 605

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/8

Showing 1-10 of 19 results
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

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

Currently, January is the cheapest month in which you can book a flight from London, Ontario to State of Washington (average of C$ 262). Flying from London, Ontario to State of Washington in December is currently the most expensive (average of C$ 353). 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.

What is the cheapest time of day to fly from YXU to WA?

Find hourly flight availability from London to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 August 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London, Ontario to State of Washington as you normally would.

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 18 August 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
8,925 reviews
Check prices

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,925 reviews
United Airlines
7.4
Good
8,925 reviews
Check prices

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
WestJet
7.2
Good
3,023 reviews
United Airlines
7.4
Good
8,925 reviews
Check prices

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Air Canada
7.1
Good
9,992 reviews
United Airlines
7.4
Good
8,925 reviews
Check prices

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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$ 555, Air Canada can have you in State of Washington from London, Ontario in 7h 44m. The distance between London, Ontario and State of Washington is about 3219 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from London, Ontario to State of Washington one-way?

    C$ 222 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from C$ 268 and C$ 329, respectively.

  • 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, January is the cheapest month in which you can book a flight from London, Ontario to State of Washington (average of C$ 262). Flying from London, Ontario to State of Washington in December is currently the most expensive (average of C$ 353). 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

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
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to LaGuardia flights
Toronto Island to Newark flights
Pearson Intl to Las Vegas flights
Pearson Intl to Miami flights
Pierre Elliott Trudeau Intl to Miami flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pearson Intl to Fort Lauderdale flights
Pearson Intl to Dallas/Fort Worth flights
Pearson Intl to Los Angeles flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Newark flights
Pearson Intl to Orlando flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Orlando flights
Pierre Elliott Trudeau Intl to Reagan-National flights
Pearson Intl to San Francisco flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Toronto Island to Fort Lauderdale flights
Pearson Intl to Seattle flights
Pearson Intl to Boston flights
Pearson Intl to Hobby flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Toronto Island to Orlando flights
Pierre Elliott Trudeau Intl to San Francisco flights
Pearson Intl to George Bush Intcntl flights
Pearson Intl to Dulles Intl flights
Pierre Elliott Trudeau Intl to Hobby flights
Pearson Intl to Baltimore flights
Pearson Intl to Nashville flights
Pierre Elliott Trudeau Intl to Baltimore flights
Pierre Elliott Trudeau Intl to Seattle flights
Pierre Elliott Trudeau Intl to George Bush Intcntl flights
Pearson Intl to Midway flights
Pearson Intl to Reagan-National flights
Toronto Island to Boston flights
Pierre Elliott Trudeau Intl to Dallas/Fort Worth flights
Toronto Island to Los Angeles flights
Pierre Elliott Trudeau Intl to Nashville flights
Pearson Intl to Atlanta flights
Toronto Island to Miami flights
Pearson Intl to Tampa flights
Pearson Intl to Denver flights
Ottawa to Newark flights
Toronto Island to Midway flights
Ottawa to Fort Lauderdale flights
Pearson Intl to Sky Harbor Intl flights

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 18 August 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 242AverageC$ 413FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 278AverageC$ 295FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 361AverageC$ 467FlexibilityNo 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!

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.