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Cheap flights from Washington to London, ON from C$ 108

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 31/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YXU
22 Apr — 29 Apr1
1 adult

Cheap flight deals from Washington to London

Keep the following information in mind while searching for Washington to London flight deals. Data was last updated 17 April 2025.

Round-trip from

C$ 247

One-way from

C$ 108
Air Canada
  • Air Canada
  • 31/5-7/6
  • 2 total stops
  • 14h 34m total
  • Washington to London
Search Deals
Air Canada
  • Air Canada
  • 31/5
  • 1 total stop
  • 6h 58m total
  • Washington to London
Search Deals

Find flight deals from Washington to London

Cheapest flights from Washington to London
Explore the most affordable flight options available from Washington to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Sat 31/511:30 a.m.SEA - YXU
1 stop6h 58mAir Canada
Sat 7/66:15 a.m.YXU - SEA
1 stop7h 36mAir Canada
Deal found 16/4C$ 247
Sat 31/51:50 p.m.SEA - YXU
1 stop12h 24mWestJet
Sat 7/66:00 a.m.YXU - SEA
1 stop9h 58mWestJet
Deal found 16/4C$ 266
Sun 1/68:10 a.m.SEA - YXU
1 stop18h 04mMultiple Airlines
Sun 8/66:15 a.m.YXU - SEA
1 stop7h 36mMultiple Airlines
Deal found 17/4C$ 272
Sat 31/511:30 a.m.SEA - YXU
1 stop6h 58mUnited Airlines
Sat 7/66:15 a.m.YXU - SEA
1 stop7h 36mUnited Airlines
Deal found 16/4C$ 293

Cheapflights Fare Finder

Customize your flight search to find flights from Washington to London 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 17 April 2025.
Use the filters below to find and compare flights from Washington to London that are best for you.

Fly from

Washington

Fly to

London

Route

Depart

Return

Price

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

11:30 a.m.-9:28 p.m.

1 stop6h 58m

London

Sat 7/6

6:15 a.m.-10:51 a.m.

1 stop7h 36m

C$ 247

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

1:50 p.m.-5:14 a.m.

1 stop12h 24m

London

Sat 7/6

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 266

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 1/6

8:10 a.m.-5:14 a.m.

1 stop18h 04m

London

Sun 8/6

6:15 a.m.-10:51 a.m.

1 stop7h 36m

C$ 272

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

11:30 a.m.-9:28 p.m.

1 stop6h 58m

London

Sat 7/6

6:15 a.m.-10:51 a.m.

1 stop7h 36m

C$ 293

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

11:30 a.m.-9:28 p.m.

1 stop6h 58m

C$ 108

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

5:26 p.m.-2:58 p.m.

2 stops18h 32m

C$ 132

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 31/5

6:00 a.m.-5:14 a.m.

3 stops20h 14m

C$ 336

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 31/7

7:35 p.m.-5:14 a.m.

1 stop6h 39m

C$ 718

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/4

Best time to book a flight from Washington to London

Have a flexible travel schedule? Discover the best time to fly to London from Washington 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 Washington to London

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

Currently, October is the cheapest month in which you can book a flight from State of Washington to London, Ontario (average of C$ 243). Flying from State of Washington to London, Ontario in December is currently the most expensive (average of C$ 478). 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.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London, Ontario ranges from 70.0 - 100.0 mm per month. January is typically the wettest month, when rainfall can reach 100.0 mm. March is typically the driest time to visit London, Ontario when rainfall is around 70.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 20.0 C. Travellers hoping to avoid the cold should look outside of February, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 17 April 2025.
United Airlines
7.4
Good
8,667 reviews
Check prices

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,667 reviews
United Airlines
7.4
Good
8,667 reviews
Check prices

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
WestJet
7.2
Good
2,809 reviews
United Airlines
7.4
Good
8,667 reviews
Check prices

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,142 reviews
United Airlines
7.4
Good
8,667 reviews
Check prices

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Washington to London. 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 into for flights to London from Washington?

    For a flight from Washington to London, you will be flying into London. London (YXU) is just 8.6 km from the centre of the city.

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

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as C$ 108. However, be on the lookout for offers from United Airlines and WestJet, as they are both options that can get you from State of Washington to London, Ontario for a low price.

  • Can I find deals for flights from Washington to London that include hotel bookings?

    Yes. In addition to deals on Washington to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to London.

  • Can I find deals for business class flights from Washington to London?

    Yes. Cheapflights offers flight deals from Washington to London 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 State of Washington to London, Ontario?

    Currently, October is the cheapest month in which you can book a flight from State of Washington to London, Ontario (average of C$ 243). Flying from State of Washington to London, Ontario in December is currently the most expensive (average of C$ 478). 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

Travelling to a place near Washington?

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