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Cheap flights from the United Kingdom to Washington from £379

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
5 Apr — 12 Apr1
1 adult

Cheap flight deals from United Kingdom to Washington

Keep the following information in mind while searching for United Kingdom to Washington flight deals. Data was last updated 31 March 2025.

Round-trip from

£459

One-way from

£379

Popular in

August

Cheapest in

January

Average price

£528

Good round-trip deal

£556 or less

Good one-way deal

£649 or less
Icelandair
  • Icelandair
  • 15/4-24/4
  • 2 total stops
  • 48h 35m total
  • United Kingdom to Washington
5/5
  • 5/5
  • 3 total stops
  • 38h 17m total
  • United Kingdom to Washington
Highest demand for flights based on searches. 15% potential increase in price (£85 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Average for round-trip flights in March 2025
Price to beat on a round-trip flight from United Kingdom to Washington.
Price to beat on a one-way flight from United Kingdom to Washington.

Find flight deals from United Kingdom to Washington

Cheapest flights from United Kingdom to Washington
Explore the most affordable flight options available from United Kingdom to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.

Tue 15/421:25LHR - SEA
1 stop31h 15mIcelandair
Thu 24/419:00SEA - LHR
1 stop17h 20mIcelandair
Deal found 30/3£459
Wed 16/415:40LGW - SEA
1 stop13h 00mIcelandair
Thu 24/419:00SEA - LGW
1 stop11h 40mIcelandair
Deal found 30/3£461
Mon 28/406:00LHR - SEA
2 stops24h 43mMultiple Airlines
Fri 23/518:50SEA - LHR
1 stop16h 50mMultiple Airlines
Deal found 29/3£461
Wed 21/506:40LHR - SEA
1 stop15h 10mScandinavian Airlines
Fri 6/616:00SEA - LHR
1 stop33h 20mScandinavian Airlines
Deal found 30/3£461
Thu 15/508:40LHR - SEA
2 stops18h 57mAir Canada
Thu 22/507:20SEA - LHR
1 stop18h 40mAir Canada
Deal found 30/3£462
Fri 2/506:30LHR - SEA
1 stop13h 55mLufthansa
Thu 8/510:00SEA - LHR
2 stops17h 50mLufthansa
Deal found 30/3£467
Thu 1/520:05LHR - SEA
2 stops30h 47mSWISS
Mon 12/514:40SEA - LHR
2 stops38h 20mSWISS
Deal found 30/3£468
Wed 21/507:05STN - SEA
1 stop14h 45mMultiple Airlines
Fri 6/616:00SEA - STN
1 stop15h 45mMultiple Airlines
Deal found 30/3£469
Tue 22/409:50LHR - SEA
1 stop15h 09mBritish Airways
Wed 30/420:20SEA - LHR
Nonstop9h 20mBritish Airways
Deal found 30/3£472
Mon 21/406:30LHR - SEA
1 stop13h 15mDelta
Mon 5/517:35SEA - LHR
Nonstop9h 45mDelta
Deal found 31/3£475
Mon 21/412:00LHR - SEA
1 stop17h 14mFinnair
Mon 5/517:40SEA - LHR
1 stop13h 30mFinnair
Deal found 30/3£476
Sun 27/420:55LHR - SEA
1 stop22h 50mKLM
Sun 4/517:35SEA - LHR
Nonstop9h 45mKLM
Deal found 30/3£479

Cheapflights Fare Finder

Customise your flight search to find flights from United Kingdom 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 858,174 searches. Data last updated 31 March 2025.
Use the filters below to find and compare flights from the United Kingdom to Washington that are best for you.

Fly from

United Kingdom

Fly to

Washington

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 15/4

21:25-20:40

1 stop31h 15m

Seattle/Tacoma Intl

Thu 24/4

19:00-20:20

1 stop17h 20m

£459

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 28/4

06:00-22:43

2 stops24h 43m

Seattle/Tacoma Intl

Fri 23/5

18:50-19:40

1 stop16h 50m

£461

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 16/4

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Thu 24/4

19:00-14:40

1 stop11h 40m

£461

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 21/5

06:40-13:50

1 stop15h 10m

Seattle/Tacoma Intl

Fri 6/6

16:00-09:20

1 stop33h 20m

£461

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 15/5

08:40-19:37

2 stops18h 57m

Seattle/Tacoma Intl

Thu 22/5

07:20-10:00

1 stop18h 40m

£462

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 2/5

06:30-12:25

1 stop13h 55m

Seattle/Tacoma Intl

Thu 8/5

12:55-10:40

1 stop13h 45m

£467

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 1/5

20:05-18:52

2 stops30h 47m

Seattle/Tacoma Intl

Mon 12/5

14:40-13:00

2 stops38h 20m

£468

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 21/5

07:05-13:50

1 stop14h 45m

Seattle/Tacoma Intl

Fri 6/6

16:00-15:45

1 stop15h 45m

£469

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 22/4

09:50-16:59

1 stop15h 09m

Seattle/Tacoma Intl

Wed 30/4

20:20-13:40

Nonstop9h 20m

£472

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 21/4

06:30-11:45

1 stop13h 15m

Seattle/Tacoma Intl

Mon 5/5

17:35-11:20

Nonstop9h 45m

£475

Flights are sorted by cheapest return flights first.

Deals found on 30/3

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from United Kingdom with our price prediction graph.
Estimated return 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 the United Kingdom to Washington

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to State of Washington (average of £622). Flying from United Kingdom to State of Washington in July is currently the most expensive (average of £946). 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 GB to WA?

Find hourly flight availability from United Kingdom 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 31 March 2025.

When flying from United Kingdom 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 United Kingdom to State of Washington

Explore weekly flight availability from United Kingdom 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 31 March 2025.

The most flights from GB0 to USWA are scheduled on a Monday (21 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Washington by month

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

In terms of precipitation, rainfall in State of Washington ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit State of Washington when rainfall is around 18.0 mm.

Temperature in Washington by month

Plan your trip to Washington by taking into account the average temperature totals 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 31 March 2025.
See what other customers who have flown with Emirates, Delta and Alaska Airlines from United Kingdom to Washington have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.1

Overall

8.0

Entertainment

8.2

Crew

8.3

Food

7.8

Comfort

8.0

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.

Boarding

8.1

Overall

8.0

Entertainment

8.2

Crew

8.3

Food

7.8

Comfort

8.0

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.
8.0
Very Good

Boarding

8.1

Overall

8.0

Entertainment

8.2

Crew

8.3

Food

7.8

Comfort

8.0

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.

Boarding

8.1

Overall

8.0

Entertainment

8.2

Crew

8.3

Food

7.8

Comfort

8.0

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.

Boarding

8.1

Overall

8.0

Entertainment

8.2

Crew

8.3

Food

7.8

Comfort

8.0

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.

Boarding

8.1

Overall

8.0

Entertainment

8.2

Crew

8.3

Food

7.8

Comfort

8.0

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.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom 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 United Kingdom to State of Washington one-way?

    £409 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on WestJet and Icelandair, with prices starting from £412 and £438, respectively.

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

    Yes. In addition to deals on United Kingdom to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Washington?

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from United Kingdom to State of Washington (average of £622). Flying from United Kingdom to State of Washington in July is currently the most expensive (average of £946). 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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Alternative routes for United Kingdom to Washington

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from United Kingdom to Washington

Discover the top 10 airlines that operate flights from United Kingdom 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 858,174 searches. Data last updated 31 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£8Average£818FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£338Average£644FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£400Average£638FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£410Average£613FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£414Average£693FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£422Average£710FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£430Average£629FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£451Average£839FlexibilityNo cancel feeOn-time70%
Search British Airways flights
DeltaCheapest£461Average£804FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest£463Average£718FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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How does Cheapflights help users find flights from United Kingdom to Washington?

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Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Washington?

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Users can book flights with no change fees policies with our dedicated filters. Book flights from United Kingdom to Washington flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from United Kingdom to Washington become cheaper?

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