How long is the flight from State of Washington to London?

Delta, United Airlines, and Icelandair can get you from State of Washington to London in just under 9h 45m. Your travel time can differ by up to 8h 39m. Airlines will cover a distance of 4783 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

One-way options have recently been found by users for as low as $278 on WestJet. Other airlines that offer cheap prices include JetBlue from $349 and SWISS from $394 one-way.

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

If weather is an important factor for your trip to London, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What are the most popular routes from State of Washington to London?

The most popular route from State of Washington to London is Seattle/Tacoma Intl - London Heathrow. You may also consider Seattle/Tacoma Intl - London Gatwick or Portland - London Heathrow.

What are the cheapest flights from State of Washington to London?

The cheapest flight price from State of Washington to London is $348. On average you can expect to pay $2,170. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for $471.

What are the most reliable airlines from State of Washington to London?

No one likes to see their flight delayed. When booking a flight from State of Washington to London consider choosing Aeromexico (88%), KLM (87%) or Air France (87%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from State of Washington to London?

American Airlines, Air Canada and Air France are the most popular airlines when flying from State of Washington to London.

How far in advance should I book a flight from State of Washington to London?

Find a great deal and save up to 41% by booking at least 52 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from State of Washington to London within the next two weeks, with the cheapest ticket starting at $641.

What is the cheapest month to fly from State of Washington to London?

The best pricing can be found in the month of October. Prices to London from State of Washington average $758. You can even find prices in October for less than $758, as users have found deals to London from as low as $515. The month of June appears to be one of the more expensive times to travel to London from State of Washington. Flying in the targeted month can save you up to 32%.

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.

$263+ Cheap Flights from Washington to London

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Cheap flight deals from Washington to London

Round-trip from	$508 (Mytrip)
One-way from	$263 (Mytrip)
Popular in	June
Cheapest in	October
Average price	$697
Good round-trip deal	$654 or less
Good one-way deal	$417 or less

From Washington to London (LON)

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One-way flight from Washington to London (LON)

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Highest demand for flights based on searches. 15% potential increase in price ($138 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Price to beat on a round-trip flight from Washington to London (LON).

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Price to beat on a one-way flight from Washington to London (LON).

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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 September 15, 2025.

Wed 10/13:45 pmSEA - STN

2 stops22h 45mMultiple Airlines

Wed 10/88:15 amSTN - SEA

2 stops20h 25mMultiple Airlines

Deal found 9/14

$508

Mon 9/225:35 pmSEA - LHR

Nonstop9h 45mVirgin Atlantic

Tue 10/77:45 pmLHR - SEA

1 stop23h 30mVirgin Atlantic

Deal found 9/13

$508

Tue 9/305:35 pmSEA - LHR

Nonstop9h 45mDelta

Wed 11/56:20 amLHR - SEA

1 stop15h 00mDelta

Deal found 9/14

$509

Wed 11/124:48 pmSEA - LHR

Nonstop9h 42mDelta

Tue 11/186:20 amLHR - SEA

1 stop13h 05mDelta

Deal found 9/12

$510

Mon 10/273:35 pmSEA - LGW

1 stop12h 20mIcelandair

Wed 11/511:55 amLGW - SEA

1 stop13h 05mIcelandair

Deal found 9/12

$511

Tue 10/148:25 pmSEA - LHR

Nonstop9h 50mDelta

Thu 10/238:40 amLHR - SEA

1 stop15h 25mDelta

Deal found 9/14

$511

Fri 11/142:35 pmSEA - LGW

1 stop12h 20mIcelandair

Sun 11/2311:55 amLGW - SEA

1 stop13h 05mIcelandair

Deal found 9/11

$512

Wed 10/11:30 pmSEA - LHR

Nonstop9h 20mBritish Airways

Tue 10/149:25 amLHR - SEA

Nonstop9h 45mBritish Airways

Deal found 9/14

$512

Tue 10/283:35 pmSEA - LTN

2 stops21h 30mMultiple Airlines

Tue 11/49:00 amLTN - SEA

2 stops16h 00mMultiple Airlines

Deal found 9/13

$512

Wed 10/87:15 amSEA - LHR

1 stop15h 15mAir Canada

Tue 10/146:50 amLHR - SEA

2 stops22h 55mAir Canada

Deal found 9/14

$513

Wed 10/111:25 amSEA - LHR

1 stop14h 35mDelta

Tue 11/46:20 amLHR - SEA

1 stop13h 05mDelta

Deal found 9/14

$514

Sun 10/57:50 amSEA - LHR

1 stop16h 15mDelta

Tue 10/1411:45 amLHR - SEA

1 stop32h 05mDelta

Deal found 9/14

$515

Best flights from Washington to London
Discover carefully curated flight deals from Washington to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Wed 10/295:45 pmSEA - LHR

Nonstop9h 45mDelta

Wed 11/56:20 amLHR - SEA

1 stop15h 00mDelta

Deal found 9/14

$509

Wed 3/116:31 amSEA - LHR

1 stop18h 24mUnited Airlines

Tue 3/171:25 pmLHR - SEA

2 stops40h 04mUnited Airlines

Deal found 9/13

$509

Fri 11/72:35 pmSEA - LGW

1 stop12h 20mIcelandair

Sat 11/1511:55 amLGW - SEA

1 stop13h 05mIcelandair

Deal found 9/13

$518

Fri 10/33:45 pmSEA - STN

2 stops17h 20mMultiple Airlines

Mon 10/66:25 amSTN - SEA

2 stops19h 25mMultiple Airlines

Deal found 9/13

$521

Tue 10/142:00 pmSEA - LCY

1 stop19h 20mVirgin Atlantic

Tue 10/219:20 amLCY - SEA

1 stop14h 45mVirgin Atlantic

Deal found 9/14

$568

Tue 11/1810:52 amPDX - LGW

2 stops22h 58mSWISS

Mon 12/86:40 pmLGW - PDX

2 stops35h 35mSWISS

Deal found 9/14

$569

Tue 3/103:00 pmSEA - LCY

1 stop18h 40mLufthansa

Wed 3/186:10 pmLCY - SEA

1 stop26h 00mLufthansa

Deal found 9/14

$617

Tue 10/2811:20 amGEG - LHR

1 stop16h 10mKLM

Thu 11/611:05 amLHR - GEG

1 stop16h 41mKLM

Deal found 9/13

$631

Mon 10/275:45 pmSEA - LHR

Nonstop9h 45mDelta

Fri 11/76:20 amLHR - SEA

1 stop15h 00mDelta

Deal found 9/14

$509

Tue 10/147:37 pmSEA - LHR

1 stop30h 48mUnited Airlines

Tue 10/212:10 pmLHR - SEA

1 stop32h 06mUnited Airlines

Deal found 9/14

$510

Sun 11/162:35 pmSEA - LGW

1 stop12h 20mIcelandair

Wed 11/2611:55 amLGW - SEA

1 stop13h 05mIcelandair

Deal found 9/12

$518

Fri 10/33:45 pmSEA - LTN

2 stops16h 00mMultiple Airlines

Mon 10/69:00 amLTN - SEA

2 stops16h 50mMultiple Airlines

Deal found 9/13

$523

Last-minute flights from Washington to London
Discover last-minute flight deals from Washington to London. Data last updated September 15, 2025 and is based on user searches.

Mon 9/225:35 pmSEA - LHR

Nonstop9h 45mVirgin Atlantic

Tue 10/77:45 pmLHR - SEA

1 stop23h 30mVirgin Atlantic

Deal found 9/13

$508

Mon 9/298:25 pmSEA - LHR

Nonstop9h 50mDelta

Thu 11/66:20 amLHR - SEA

1 stop13h 05mDelta

Deal found 9/14

$510

Tue 9/305:35 pmSEA - LHR

Nonstop9h 45mDelta

Fri 10/316:20 amLHR - SEA

1 stop15h 00mDelta

Deal found 9/13

$509

Wed 10/13:45 pmSEA - STN

2 stops22h 45mMultiple Airlines

Wed 10/88:15 amSTN - SEA

2 stops20h 25mMultiple Airlines

Deal found 9/14

$508

Wed 10/11:30 pmSEA - LHR

Nonstop9h 20mBritish Airways

Tue 10/149:25 amLHR - SEA

Nonstop9h 45mBritish Airways

Deal found 9/14

$512

Wed 10/111:25 amSEA - LHR

1 stop14h 35mDelta

Tue 11/46:20 amLHR - SEA

1 stop13h 05mDelta

Deal found 9/14

$514

Sat 10/45:26 pmSEA - LHR

1 stop33h 44mUnited Airlines

Tue 10/145:40 pmLHR - SEA

1 stop36h 05mUnited Airlines

Deal found 9/13

$516

Sun 10/57:50 amSEA - LHR

1 stop16h 15mDelta

Tue 10/1411:45 amLHR - SEA

1 stop32h 05mDelta

Deal found 9/14

$515

Wed 10/87:15 amSEA - LHR

1 stop15h 15mAir Canada

Tue 10/146:50 amLHR - SEA

2 stops22h 55mAir Canada

Deal found 9/14

$513

Tue 10/148:25 pmSEA - LHR

Nonstop9h 50mDelta

Thu 10/238:40 amLHR - SEA

1 stop15h 25mDelta

Deal found 9/14

$511

Mon 10/273:35 pmSEA - LGW

1 stop12h 20mIcelandair

Wed 11/511:55 amLGW - SEA

1 stop13h 05mIcelandair

Deal found 9/12

$511

Tue 10/283:35 pmSEA - LTN

2 stops21h 30mMultiple Airlines

Tue 11/49:00 amLTN - SEA

2 stops16h 00mMultiple Airlines

Deal found 9/13

$512

One-way flights from Washington to London
Search for one-way flight options from Washington to London. Find affordable one-way fares based on user searches. Data last updated September 15, 2025.

Tue 10/147:05 amSEA - LGW

2 stops29h 10mMultiple Airlines

Deal found 9/12

$263

Sun 3/811:55 amSEA - LHR

3 stops17h 55mWestJet

Deal found 9/13

$264

Tue 10/1410:00 amSEA - STN

3 stops22h 35mMultiple Airlines

Deal found 9/13

$265

Tue 10/282:40 pmSEA - LGW

1 stop32h 20mMultiple Airlines

Deal found 9/13

$265

Sat 10/49:39 pmSEA - LHR

2 stops40h 21mMultiple Airlines

Deal found 9/14

$265

Tue 10/142:05 pmSEA - LTN

2 stops24h 05mMultiple Airlines

Deal found 9/14

$265

Sun 11/165:45 pmSEA - LHR

3 stops35h 05mMultiple Airlines

Deal found 9/14

$266

Mon 3/911:55 amSEA - LHR

3 stops17h 55mWestJet

Deal found 9/13

$267

Thu 11/133:10 pmSEA - LHR

1 stop13h 40mWestJet

Deal found 9/13

$268

Fri 11/143:10 pmSEA - LHR

1 stop13h 40mWestJet

Deal found 9/14

$269

Thu 10/168:40 amSEA - STN

2 stops20h 50mMultiple Airlines

Deal found 9/14

$270

Tue 11/411:34 pmSEA - LGW

1 stop22h 26mMultiple Airlines

Deal found 9/14

$271

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 10/29

5:45 pm-10:30 am

Nonstop9h 45m

London Heathrow

Wed 11/5

6:20 am-1:20 pm

1 stop15h 00m

$509

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 3/11

6:31 am-7:55 am

1 stop18h 24m

London Heathrow

Tue 3/17

1:25 pm-10:29 pm

2 stops40h 04m

$509

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 10/27

5:45 pm-10:30 am

Nonstop9h 45m

London Heathrow

Fri 11/7

6:20 am-1:20 pm

1 stop15h 00m

$509

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/14

7:37 pm-10:25 am

1 stop30h 48m

London Heathrow

Tue 10/21

2:10 pm-2:16 pm

1 stop32h 06m

$510

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/28

8:20 pm-12:50 pm

Nonstop9h 30m

London Heathrow

Tue 11/11

6:20 am-11:25 am

1 stop13h 05m

$510

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 10/27

8:20 pm-12:50 pm

Nonstop9h 30m

London Heathrow

Tue 11/11

6:20 am-11:25 am

1 stop13h 05m

$510

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 11/26

4:48 pm-10:30 am

Nonstop9h 42m

London Heathrow

Tue 12/2

10:00 am-11:50 am

1 stop33h 50m

$511

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 10/1

11:25 am-9:15 am

1 stop13h 50m

London Heathrow

Wed 11/5

6:20 am-1:20 pm

1 stop15h 00m

$514

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 11/7

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Sat 11/15

11:55 am-5:00 pm

1 stop13h 05m

$518

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 11/16

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Wed 11/26

11:55 am-5:00 pm

1 stop13h 05m

$518

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results

...

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?

Currently, November is the cheapest month in which you can book a flight from State of Washington to London (average of $661). Flying from State of Washington to London in June is currently the most expensive (average of $1,097). 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 WA to LON?

When flying from State of Washington to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from State of Washington to London

The most flights from USWA to LON are scheduled on a Monday (21 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (21 on average).

Related info for your journey

How long is the flight from State of Washington to London?
Delta, United Airlines, and Icelandair can get you from State of Washington to London in just under 9h 45m. Your travel time can differ by up to 8h 39m. Airlines will cover a distance of 4783 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines to fly from State of Washington to London one-way?
One-way options have recently been found by users for as low as $278 on WestJet. Other airlines that offer cheap prices include JetBlue from $349 and SWISS from $394 one-way.
What are the most popular routes from State of Washington to London?
The most popular route from State of Washington to London is Seattle/Tacoma Intl - London Heathrow. You may also consider Seattle/Tacoma Intl - London Gatwick or Portland - London Heathrow.
What are the most reliable airlines from State of Washington to London?
No one likes to see their flight delayed. When booking a flight from State of Washington to London consider choosing Aeromexico (88%), KLM (87%) or Air France (87%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from State of Washington to London?
The cheapest flight price from State of Washington to London is $348. On average you can expect to pay $2,170. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for $471.
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?
Currently, November is the cheapest month in which you can book a flight from State of Washington to London (average of $661). Flying from State of Washington to London in June is currently the most expensive (average of $1,097). 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.

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Harrow

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Croydon

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Dartford

Dover

Winchester

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Gatwick

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Top 10 airlines flying from Washington to London

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest$378	Average$865	FlexibilityNo cancel fee	On-time76%
Icelandair	Cheapest$484	Average$646	FlexibilityNo cancel fee	On-time76%
Aer Lingus	Cheapest$523	Average$733	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$532	Average$871	FlexibilityNo cancel fee	On-time77%
Air France	Cheapest$532	Average$804	FlexibilityNo cancel fee	On-time77%
United Airlines	Cheapest$547	Average$851	FlexibilityNo cancel fee	On-time69%
Finnair	Cheapest$556	Average$706	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$556	Average$804	FlexibilityNo cancel fee	On-time70%
Delta	Cheapest$563	Average$914	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$569	Average$944	FlexibilityNo cancel fee	On-time71%

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$263+ Cheap flights from Washington to London (LON)

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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.

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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 September 15, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Washington to London

Cheapest flights from Washington to LondonExplore 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 September 15, 2025.

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 September 15, 2025.

Cheapflights Fare Finder

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

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.

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?

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

Find hourly flight availability from Washington to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

Weekly flight availability from State of Washington to London

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.

How long is the flight from State of Washington to London?

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

What are the most popular routes from State of Washington to London?

What are the most reliable airlines from State of Washington to London?

What are the cheapest flights from State of Washington to London?

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

How can I find direct flights from Washington to London?

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

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

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Top 10 airlines flying from Washington to London

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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 September 15, 2025.