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 $534. 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 $1,593, our data indicates the cheapest price to be $661. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around $481.

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 Singapore Airlines (94%), Aeromexico (92%) and KLM (91%).

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 40% 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 $781. For sooner than that we have options available in the next 3 days from $1,058.

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 $767 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.

$532+ Flights from London to Washington

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Cheap flight deals from London to Washington

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$605 (TravelTrolley)
One-way from	$532 (Mytrip)
Popular in	August
Cheapest in	January
Average price	$709
Good round-trip deal	$720 or less
Good one-way deal	$764 or less

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

Search Deals

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

Search Deals

Highest demand for flights based on searches. 16% potential increase in price ($149 potential increase over avg. RT price).

Search Deals

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

Search Deals

Average for round-trip flights in April 2025

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

Search Deals

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 April 22, 2025.

Thu 5/88:40 amLHR - SEA

2 stops18h 57mAir Canada

Sun 5/115:30 amSEA - LHR

2 stops17h 00mAir Canada

Deal found 4/22

$605

Wed 4/309:15 amLHR - SEA

2 stops21h 34mFinnair

Wed 5/710:59 pmSEA - LHR

2 stops26h 46mFinnair

Deal found 4/22

$606

Tue 11/411:55 amLGW - SEA

1 stop13h 05mIcelandair

Tue 11/112:35 pmSEA - LGW

1 stop12h 20mIcelandair

Deal found 4/22

$607

Mon 4/286:30 amLHR - SEA

2 stops19h 58mMultiple Airlines

Tue 5/137:20 amSEA - LHR

1 stop15h 10mMultiple Airlines

Deal found 4/21

$607

Mon 9/87:40 amLHR - SEA

1 stop17h 19mBritish Airways

Tue 9/231:30 pmSEA - LHR

Nonstop9h 20mBritish Airways

Deal found 4/21

$608

Mon 4/289:25 pmLHR - SEA

1 stop31h 15mIcelandair

Tue 5/133:45 pmSEA - LHR

1 stop20h 35mIcelandair

Deal found 4/21

$609

Mon 5/51:25 pmLHR - SEA

Nonstop10h 20mVirgin Atlantic

Tue 5/205:35 pmSEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 4/21

$612

Wed 9/107:25 amLHR - SEA

1 stop17h 34mLufthansa

Tue 9/2310:00 amSEA - LHR

2 stops17h 50mLufthansa

Deal found 4/20

$618

Mon 5/128:05 pmLHR - SEA

2 stops30h 28mSWISS

Mon 5/192:40 pmSEA - LHR

2 stops20h 40mSWISS

Deal found 4/21

$621

Wed 5/710:50 amLHR - SEA

1 stop14h 09mUnited Airlines

Tue 5/209:00 amSEA - LHR

1 stop14h 25mUnited Airlines

Deal found 4/22

$622

Sun 5/48:55 pmLHR - SEA

1 stop22h 45mKLM

Wed 5/145:35 pmSEA - LHR

Nonstop9h 45mKLM

Deal found 4/21

$625

Mon 4/283:05 pmLGW - SEA

2 stops27h 53mMultiple Airlines

Tue 5/1310:40 pmSEA - LGW

1 stop25h 30mMultiple Airlines

Deal found 4/21

$638

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 April 22, 2025.

Thu 5/88:40 amLHR - SEA

2 stops18h 57mAir Canada

Sun 5/115:30 amSEA - LHR

2 stops17h 00mAir Canada

Deal found 4/22

$605

Thu 9/116:30 amLHR - SEA

1 stop13h 25mMultiple Airlines

Thu 9/257:15 pmSEA - LHR

2 stops27h 15mMultiple Airlines

Deal found 4/20

$606

Thu 8/211:05 pmLHR - SEA

1 stop15h 35mIcelandair

Thu 9/1111:30 pmSEA - LHR

1 stop12h 50mIcelandair

Deal found 4/21

$607

Mon 9/87:40 amLHR - SEA

1 stop17h 19mBritish Airways

Tue 9/231:30 pmSEA - LHR

Nonstop9h 20mBritish Airways

Deal found 4/21

$608

Mon 9/112:15 pmLHR - SEA

2 stops20h 13mFinnair

Sun 9/2111:55 pmSEA - LHR

2 stops22h 20mFinnair

Deal found 4/21

$610

Mon 5/51:25 pmLHR - SEA

Nonstop10h 20mVirgin Atlantic

Tue 5/205:35 pmSEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 4/21

$612

Wed 9/106:55 amLHR - SEA

1 stop18h 04mLufthansa

Wed 9/2410:00 amSEA - LHR

2 stops17h 50mLufthansa

Deal found 4/20

$618

Mon 5/128:05 pmLHR - SEA

2 stops30h 28mSWISS

Mon 5/192:40 pmSEA - LHR

2 stops20h 40mSWISS

Deal found 4/21

$621

Wed 5/710:50 amLHR - SEA

1 stop14h 09mUnited Airlines

Tue 5/209:00 amSEA - LHR

1 stop14h 25mUnited Airlines

Deal found 4/22

$622

Sun 5/48:55 pmLHR - SEA

1 stop22h 45mKLM

Wed 5/145:35 pmSEA - LHR

Nonstop9h 45mKLM

Deal found 4/21

$625

Wed 9/39:50 amLHR - SEA

Nonstop9h 45mIberia

Wed 9/178:20 pmSEA - LHR

Nonstop9h 20mIberia

Deal found 4/22

$646

Mon 5/199:05 pmLHR - SEA

2 stops48h 45mScandinavian Airlines

Mon 5/264:00 pmSEA - LHR

1 stop16h 00mScandinavian Airlines

Deal found 4/21

$652

Last-minute flights from London to Washington
Discover last-minute flight deals from London to Washington. Data last updated April 22, 2025 and is based on user searches.

Mon 4/286:30 amLHR - SEA

2 stops19h 58mMultiple Airlines

Tue 5/137:20 amSEA - LHR

1 stop15h 10mMultiple Airlines

Deal found 4/21

$607

Mon 4/289:25 pmLHR - SEA

1 stop31h 15mIcelandair

Tue 5/133:45 pmSEA - LHR

1 stop20h 35mIcelandair

Deal found 4/21

$609

Mon 4/283:05 pmLGW - SEA

2 stops27h 53mMultiple Airlines

Tue 5/1310:40 pmSEA - LGW

1 stop25h 30mMultiple Airlines

Deal found 4/21

$638

Mon 4/286:30 amLHR - SEA

1 stop13h 15mDelta

Tue 5/135:35 pmSEA - LHR

Nonstop9h 45mDelta

Deal found 4/21

$649

Mon 4/2812:20 pmLGW - SEA

2 stops20h 31mAmerican Airlines

Tue 5/135:22 amSEA - LGW

2 stops18h 48mAmerican Airlines

Deal found 4/21

$651

Mon 4/288:40 amLHR - SEA

1 stop15h 20mKLM

Tue 5/131:30 pmSEA - LHR

1 stop12h 20mKLM

Deal found 4/20

$655

Tue 4/293:40 pmLGW - SEA

1 stop13h 00mIcelandair

Tue 5/67:00 pmSEA - LGW

1 stop11h 40mIcelandair

Deal found 4/22

$643

Wed 4/309:15 amLHR - SEA

2 stops21h 34mFinnair

Wed 5/710:59 pmSEA - LHR

2 stops26h 46mFinnair

Deal found 4/22

$606

Wed 4/307:45 amLHR - SEA

2 stops20h 36mUnited Airlines

Wed 5/72:55 pmSEA - LHR

1 stop14h 25mUnited Airlines

Deal found 4/22

$631

Wed 4/304:30 pmLHR - SEA

Nonstop9h 50mBritish Airways

Wed 5/78:20 pmSEA - LHR

Nonstop9h 20mBritish Airways

Deal found 4/21

$641

Fri 5/29:30 amLHR - SEA

1 stop18h 07mLufthansa

Sat 5/107:00 amSEA - LHR

2 stops18h 40mLufthansa

Deal found 4/21

$619

Fri 5/29:30 amLHR - SEA

1 stop18h 07mAir Canada

Sun 5/187:20 amSEA - LHR

1 stop15h 10mAir Canada

Deal found 4/22

$650

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 April 22, 2025.

Wed 5/1410:00 amLTN - SEA

2 stops17h 10mMultiple Airlines

Deal found 4/21

$532

Tue 6/102:10 pmLHR - SEA

1 stop30h 48mWestJet

Deal found 4/22

$534

Fri 5/1610:20 pmSTN - SEA

2 stops31h 40mMultiple Airlines

Deal found 4/22

$535

Tue 4/299:50 amLHR - SEA

1 stop15h 09mAer Lingus

Deal found 4/21

$535

Tue 6/249:25 pmLHR - SEA

2 stops23h 33mMultiple Airlines

Deal found 4/22

$539

Fri 7/1110:45 amLGW - SEA

3 stops43h 15mMultiple Airlines

Deal found 4/22

$552

Thu 6/58:45 amLCY - SEA

2 stops18h 25mMultiple Airlines

Deal found 4/22

$561

Thu 9/1810:45 amLGW - SEA

2 stops33h 48mWestJet

Deal found 4/21

$581

Sat 5/1011:40 amSTN - PDX

1 stop14h 15mMultiple Airlines

Deal found 4/21

$601

Fri 6/273:00 pmLGW - PDX

3 stops34h 28mMultiple Airlines

Deal found 4/22

$601

Sun 8/311:00 pmLGW - SEA

1 stop15h 40mIcelandair

Deal found 4/21

$604

Thu 9/182:10 pmLHR - PDX

1 stop30h 38mWestJet

Deal found 4/21

$613

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

LHR - SEA

LHRSEA

London Heathrow

Thu 5/8

8:40 am-7:37 pm

2 stops18h 57m

Seattle/Tacoma Intl

Sun 5/11

5:30 am-6:30 am

2 stops17h 00m

$605

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 9/11

6:30 am-11:55 am

1 stop13h 25m

Seattle/Tacoma Intl

Thu 9/25

7:15 pm-6:30 am

2 stops27h 15m

$606

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 8/21

1:05 pm-8:40 pm

1 stop15h 35m

Seattle/Tacoma Intl

Thu 9/11

11:30 pm-8:20 pm

1 stop12h 50m

$607

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 9/8

7:40 am-4:59 pm

1 stop17h 19m

Seattle/Tacoma Intl

Tue 9/23

1:30 pm-6:50 am

Nonstop9h 20m

$608

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 9/8

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Mon 9/22

7:00 pm-2:35 pm

1 stop11h 35m

$608

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 9/1

4:25 pm-12:44 am

1 stop16h 19m

Seattle/Tacoma Intl

Sun 9/21

11:55 pm-6:15 am

2 stops22h 20m

$610

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 5/5

1:25 pm-3:45 pm

Nonstop10h 20m

Seattle/Tacoma Intl

Tue 5/20

5:35 pm-11:20 am

Nonstop9h 45m

$612

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 9/10

7:25 am-4:59 pm

1 stop17h 34m

Seattle/Tacoma Intl

Tue 9/23

10:00 am-11:50 am

2 stops17h 50m

$618

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 5/12

8:05 pm-6:33 pm

2 stops30h 28m

Seattle/Tacoma Intl

Mon 5/19

2:40 pm-7:20 pm

2 stops20h 40m

$621

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 5/7

9:00 am-4:59 pm

1 stop15h 59m

Seattle/Tacoma Intl

Sun 5/18

2:40 pm-2:10 pm

1 stop15h 30m

$622

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

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.

Weekly flight availability from London to State of Washington

The most flights from LON to USWA are scheduled on a Tuesday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 on average).

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 Emirates, Delta and KLM 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.

Emirates

8.0

Very good

3,205 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Emirates

8.0

Very good

3,205 reviews

Emirates

8.0

Very good

3,205 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jun 2024

DXB - IAH

Delta

8.0

Very good

7,920 reviews

Emirates

8.0

Very good

3,205 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jun 2024

DXB - IAH

KLM

7.8

Good

1,331 reviews

Emirates

8.0

Very good

3,205 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jun 2024

DXB - IAH

Finnair

7.6

Good

1,272 reviews

Emirates

8.0

Very good

3,205 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jun 2024

DXB - IAH

Austrian Airlines

7.6

Good

780 reviews

Emirates

8.0

Very good

3,205 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Jun 2024

DXB - IAH

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 $534. 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 Singapore Airlines (94%), Aeromexico (92%) and KLM (91%).
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 $1,593, our data indicates the cheapest price to be $661. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around $481.
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

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Yakima car rentals

Top 7 airlines flying from London to Washington

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$402	Average$691	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$560	Average$774	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$621	Average$818	FlexibilityNo cancel fee	On-time71%
Virgin Atlantic	Cheapest$635	Average$978	FlexibilityNo cancel fee	On-time72%
Iberia	Cheapest$673	Average$1,001	FlexibilityNo cancel fee	On-time77%
KLM	Cheapest$674	Average$844	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$675	Average$965	FlexibilityNo cancel fee	On-timeN/A

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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.

$532+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to Washington with Cheapflights

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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 April 22, 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 April 22, 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 April 22, 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 April 22, 2025.

Weekly flight availability from London to State of Washington

Explore weekly flight availability from London to Washington. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 22, 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 Emirates, Delta and KLM 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 April 22, 2025.