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

The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $503. However, be on the lookout for offers from Aer Lingus and Icelandair, as they are both options that can get you from London to State of Washington for a low price.

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

While some choose either London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl, London Heathrow - Seattle/Tacoma Intl is the most popular route from London to State of Washington.

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

Looking for the cheapest flight from London to State of Washington? While on average our users pay $1,594, our data indicates the cheapest price to be $633. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around $432.

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

The top 3 most reliable airlines when flying from London to State of Washington are Aeromexico (98%), Singapore Airlines (98%) and KLM (92%).

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

When booking a flight from London to State of Washington, you may want to consider flying on American Airlines, British Airways or Delta as they are the most popular for this route.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 44 days in advance, which can save you up to 37% on flights from London to State of Washington compared to booking the week you need them. Waiting 44 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $782. For sooner than that we have options available in the next 3 days from $1,078.

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

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, January can be a great choice for travel to State of Washington. Flights to State of Washington from London in January are about $770 on average during January, but can be found for as low as $437.

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.

$489+ Flights from London to Washington

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Cheap flight deals from London to Washington

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$592 (The Travel House)
One-way from	$489 (Norse)
Popular in	August
Cheapest in	January
Average price	$679
Good round-trip deal	$693 or less
Good one-way deal	$759 or less

Provider with most accurate pricing for London (LON)-Seattle/Tacoma Intl flight deals.

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Provider most trusted by Cheapflights users for London (LON)-Seattle/Tacoma Intl flights.

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From London (LON) to Washington

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One-way flight from London (LON) to Washington

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Highest demand for flights based on searches. 15% potential increase in price ($144 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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

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

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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 March 28, 2025.

Mon 6/23:40 pmLGW - SEA

1 stop13h 00mIcelandair

Mon 6/1611:30 pmSEA - LGW

1 stop31h 10mIcelandair

Deal found 3/26

$592

Wed 4/169:25 pmLHR - SEA

1 stop31h 15mIcelandair

Thu 4/247:00 pmSEA - LHR

1 stop17h 20mIcelandair

Deal found 3/27

$594

Wed 5/216:40 amLHR - SEA

1 stop15h 10mScandinavian Airlines

Mon 6/24:00 pmSEA - LHR

1 stop16h 00mScandinavian Airlines

Deal found 3/27

$597

Fri 4/256:30 amLHR - SEA

1 stop13h 55mLufthansa

Fri 5/212:55 pmSEA - LHR

1 stop13h 45mLufthansa

Deal found 3/26

$603

Thu 5/16:00 amLHR - SEA

2 stops24h 42mSWISS

Mon 5/122:40 pmSEA - LHR

2 stops19h 10mSWISS

Deal found 3/27

$604

Thu 5/19:30 amLHR - SEA

1 stop18h 07mAir Canada

Wed 5/1410:00 amSEA - LHR

2 stops16h 00mAir Canada

Deal found 3/28

$608

Tue 4/226:50 amLHR - SEA

2 stops23h 53mUnited Airlines

Fri 5/28:50 amSEA - LHR

2 stops18h 55mUnited Airlines

Deal found 3/27

$610

Wed 5/217:05 amSTN - SEA

1 stop14h 45mMultiple Airlines

Mon 6/24:00 pmSEA - STN

1 stop16h 15mMultiple Airlines

Deal found 3/27

$612

Wed 4/237:40 amLHR - SEA

1 stop17h 19mBritish Airways

Wed 4/308:20 pmSEA - LHR

Nonstop9h 20mBritish Airways

Deal found 3/27

$615

Tue 4/297:20 pmLCY - SEA

2 stops33h 55mMultiple Airlines

Sun 5/42:15 pmSEA - LCY

2 stops38h 15mMultiple Airlines

Deal found 3/26

$618

Mon 4/211:25 pmLHR - SEA

Nonstop10h 20mVirgin Atlantic

Mon 5/55:35 pmSEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 3/27

$618

Tue 4/222:30 pmLGW - SEA

2 stops31h 33mFinnair

Tue 4/2910:05 pmSEA - LGW

2 stops26h 05mFinnair

Deal found 3/26

$622

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 March 28, 2025.

Mon 6/23:40 pmLGW - SEA

1 stop13h 00mIcelandair

Mon 6/1611:30 pmSEA - LGW

1 stop31h 10mIcelandair

Deal found 3/26

$592

Wed 5/216:40 amLHR - SEA

1 stop15h 10mScandinavian Airlines

Mon 6/24:00 pmSEA - LHR

1 stop16h 00mScandinavian Airlines

Deal found 3/27

$597

Tue 5/69:25 amLHR - SEA

Nonstop9h 45mFinnair

Wed 5/215:40 pmSEA - LHR

1 stop13h 30mFinnair

Deal found 3/27

$598

Tue 5/2011:25 amLHR - SEA

2 stops34h 35mUnited Airlines

Wed 7/211:11 amSEA - LHR

1 stop17h 09mUnited Airlines

Deal found 3/25

$599

Fri 4/256:30 amLHR - SEA

1 stop13h 55mLufthansa

Fri 5/212:55 pmSEA - LHR

1 stop13h 45mLufthansa

Deal found 3/26

$603

Wed 4/306:00 amLHR - SEA

2 stops24h 43mSWISS

Wed 5/72:40 pmSEA - LHR

2 stops20h 40mSWISS

Deal found 3/26

$606

Mon 5/56:30 amLHR - SEA

1 stop17h 27mKLM

Wed 5/148:20 pmSEA - LHR

Nonstop9h 55mKLM

Deal found 3/25

$608

Mon 4/219:50 amLHR - SEA

Nonstop9h 45mMultiple Airlines

Mon 5/55:40 pmSEA - LHR

1 stop13h 30mMultiple Airlines

Deal found 3/26

$609

Sat 4/269:30 amLHR - SEA

2 stops20h 11mAir Canada

Sat 5/37:05 amSEA - LHR

1 stop15h 25mAir Canada

Deal found 3/27

$613

Wed 4/231:25 pmLHR - SEA

Nonstop10h 20mVirgin Atlantic

Wed 4/305:35 pmSEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 3/26

$617

Mon 4/216:20 amLHR - SEA

1 stop18h 39mBritish Airways

Mon 5/51:30 pmSEA - LHR

Nonstop9h 20mBritish Airways

Deal found 3/26

$625

Mon 4/214:30 pmLHR - SEA

Nonstop9h 50mAmerican Airlines

Mon 5/55:40 pmSEA - LHR

1 stop13h 30mAmerican Airlines

Deal found 3/26

$628

Last-minute flights from London to Washington
Discover last-minute flight deals from London to Washington. Data last updated March 28, 2025 and is based on user searches.

Wed 4/29:50 amLHR - SEA

1 stop15h 09mAer Lingus

Wed 5/76:45 pmSEA - LHR

1 stop12h 10mAer Lingus

Deal found 3/27

$1,026

Thu 4/38:40 amLHR - SEA

1 stop15h 20mDelta

Fri 4/258:20 pmSEA - LHR

Nonstop9h 55mDelta

Deal found 3/27

$808

Thu 4/310:00 amLCY - SEA

1 stop14h 00mDelta

Sat 4/192:10 pmSEA - LCY

1 stop15h 05mDelta

Deal found 3/26

$1,023

Fri 4/49:20 amLCY - SEA

1 stop14h 40mKLM

Wed 4/236:10 pmSEA - LCY

1 stop14h 30mKLM

Deal found 3/26

$984

Sun 4/69:20 pmLGW - SEA

2 stops29h 49mMultiple Airlines

Mon 4/287:00 pmSEA - LGW

1 stop11h 35mMultiple Airlines

Deal found 3/26

$850

Sun 4/68:10 pmLCY - SEA

2 stops26h 55mVirgin Atlantic

Mon 4/286:10 pmSEA - LCY

1 stop17h 30mVirgin Atlantic

Deal found 3/26

$904

Sun 4/62:45 pmLHR - SEA

1 stop16h 04mFinnair

Thu 4/101:35 pmSEA - LHR

1 stop14h 40mFinnair

Deal found 3/27

$964

Mon 4/711:25 amLHR - SEA

2 stops34h 34mUnited Airlines

Tue 4/222:12 pmSEA - LHR

1 stop33h 28mUnited Airlines

Deal found 3/27

$696

Mon 4/79:10 pmLHR - SEA

1 stop27h 49mBritish Airways

Sun 4/1311:20 amSEA - LHR

1 stop35h 30mBritish Airways

Deal found 3/27

$724

Mon 4/79:10 pmLHR - SEA

1 stop27h 49mMultiple Airlines

Tue 4/222:00 pmSEA - LHR

1 stop34h 00mMultiple Airlines

Deal found 3/27

$769

Mon 4/75:10 pmLHR - SEA

2 stops36h 17mKLM

Sun 4/136:00 amSEA - LHR

1 stop18h 55mKLM

Deal found 3/27

$865

Mon 4/79:30 amLHR - SEA

2 stops36h 53mAir Canada

Sun 4/1310:25 amSEA - LHR

2 stops17h 25mAir Canada

Deal found 3/27

$899

One-way flights from London to Washington
Search for one-way flight options from London to Washington. Find affordable one-way fares based on user searches. Data last updated March 28, 2025.

Sun 6/1510:55 amLGW - PDX

1 stop30h 28mMultiple Airlines

Deal found 3/27

$489

Sat 6/216:35 amSTN - PDX

3 stops34h 48mMultiple Airlines

Deal found 3/27

$493

Sun 6/222:10 pmLHR - PDX

2 stops26h 02mMultiple Airlines

Deal found 3/27

$493

Tue 6/242:10 pmLHR - PDX

1 stop30h 42mWestJet

Deal found 3/27

$503

Sun 6/1510:45 amLGW - PDX

2 stops34h 07mWestJet

Deal found 3/27

$518

Mon 4/2810:00 amLGW - SEA

1 stop19h 59mMultiple Airlines

Deal found 3/27

$529

Mon 4/219:50 amLHR - SEA

1 stop15h 09mAer Lingus

Deal found 3/26

$529

Sat 4/53:15 pmSTN - SEA

3 stops59h 54mMultiple Airlines

Deal found 3/26

$530

Thu 5/12:10 pmLHR - SEA

1 stop14h 18mWestJet

Deal found 3/27

$530

Sun 4/67:40 amLTN - SEA

3 stops43h 29mMultiple Airlines

Deal found 3/27

$531

Sun 6/89:25 pmLHR - SEA

2 stops23h 33mMultiple Airlines

Deal found 3/27

$535

Tue 6/173:40 pmLGW - SEA

1 stop13h 00mIcelandair

Deal found 3/26

$539

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 6/2

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Mon 6/16

11:30 pm-2:40 pm

1 stop31h 10m

$592

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 4/16

9:25 pm-8:40 pm

1 stop31h 15m

Seattle/Tacoma Intl

Thu 4/24

7:00 pm-8:20 pm

1 stop17h 20m

$594

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 5/21

6:40 am-1:50 pm

1 stop15h 10m

Seattle/Tacoma Intl

Mon 6/2

4:00 pm-4:00 pm

1 stop16h 00m

$597

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 4/25

6:30 am-12:25 pm

1 stop13h 55m

Seattle/Tacoma Intl

Fri 5/2

12:55 pm-10:40 am

1 stop13h 45m

$603

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 5/1

6:00 am-10:42 pm

2 stops24h 42m

Seattle/Tacoma Intl

Mon 5/12

2:40 pm-5:50 pm

2 stops19h 10m

$604

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 5/1

9:30 am-7:37 pm

1 stop18h 07m

Seattle/Tacoma Intl

Wed 5/14

10:00 am-10:00 am

2 stops16h 00m

$608

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 4/22

6:50 am-10:43 pm

2 stops23h 53m

Seattle/Tacoma Intl

Fri 5/2

8:50 am-11:45 am

2 stops18h 55m

$610

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 5/21

7:05 am-1:50 pm

1 stop14h 45m

Seattle/Tacoma Intl

Mon 6/2

4:00 pm-4:15 pm

1 stop16h 15m

$612

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 4/23

7:40 am-4:59 pm

1 stop17h 19m

Seattle/Tacoma Intl

Wed 4/30

8:20 pm-1:40 pm

Nonstop9h 20m

$615

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 4/21

1:25 pm-3:45 pm

Nonstop10h 20m

Seattle/Tacoma Intl

Mon 5/5

5:35 pm-11:20 am

Nonstop9h 45m

$618

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 60 results

...

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 to State of Washington?

Currently, January is the cheapest month in which you can book a flight from London to State of Washington (average of $238). Flying from London to State of Washington in July is currently the most expensive (average of $411). 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 LON to WA?

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

Rainfall in Washington by month

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

If weather is an important factor for your trip to State of Washington, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Washington

See what other customers who have flown with Delta, KLM and Finnair from London to Washington have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,896 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,267 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.5

Good

769 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS

7.5

Good

1,570 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines to fly from London to State of Washington one-way?
The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $503. However, be on the lookout for offers from Aer Lingus and Icelandair, as they are both options that can get you from London to State of Washington for a low price.
What are the most popular routes from London to State of Washington?
While some choose either London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl, London Heathrow - Seattle/Tacoma Intl is the most popular route from London to State of Washington.
What are the most reliable airlines from London to State of Washington?
The top 3 most reliable airlines when flying from London to State of Washington are Aeromexico (98%), Singapore Airlines (98%) and KLM (92%).
What are the cheapest flights from London to State of Washington?
Looking for the cheapest flight from London to State of Washington? While on average our users pay $1,594, our data indicates the cheapest price to be $633. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around $432.
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 to State of Washington?
Currently, January is the cheapest month in which you can book a flight from London to State of Washington (average of $238). Flying from London to State of Washington in July is currently the most expensive (average of $411). 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

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Complete your trip

State of Washington car rentals

Seattle/Tacoma Intl Airport car rentals

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Pasco Tri Cities Airport car rentals

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Pullman Moscow Regional Airport car rentals

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Kenmore Air Harbor Airport car rentals

Seattle car rentals

Yakima car rentals

Top 7 airlines flying from London to Washington

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$402	Average$724	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$560	Average$834	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$621	Average$811	FlexibilityNo cancel fee	On-time71%
Virgin Atlantic	Cheapest$635	Average$952	FlexibilityNo cancel fee	On-time72%
Iberia	Cheapest$673	Average$975	FlexibilityNo cancel fee	On-time77%
KLM	Cheapest$674	Average$844	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$681	Average$962	FlexibilityNo cancel fee	On-timeN/A

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$489+ Cheap flights from London (LON) to Washington

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 6/15. 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 London to Washington

Keep the following information in mind while searching for London to Washington flight deals. Data was last updated March 28, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from London to Washington

Cheapest flights from London to WashingtonExplore 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 March 28, 2025.

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 March 28, 2025.

Cheapflights Fare Finder

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

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.

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 to State of Washington?

What is the cheapest time of day to fly from LON 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 March 28, 2025.

Rainfall in Washington by month

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

Temperature in Washington by month

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

Reviews of airlines servicing Washington

See what other customers who have flown with Delta, KLM and Finnair from London to Washington have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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

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

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

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

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

How can I find direct flights from London to Washington?

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

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

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.

Top 7 airlines flying from London to Washington

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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 March 28, 2025.