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Cheap flights from the United Kingdom to Washington from £308

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

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 October 2025.

Round-trip from

£452

One-way from

£308

Popular in

July

Cheapest in

January

Average price

£551

Good round-trip deal

£553 or less

Good one-way deal

£517 or less
Icelandair
  • Icelandair
  • 16/12-14/1
  • 2 total stops
  • 49h 20m total
  • United Kingdom to Washington
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12/12
  • 12/12
  • 3 total stops
  • 52h 33m total
  • United Kingdom to Washington
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from United Kingdom to Washington.
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Price to beat on a one-way flight from United Kingdom to Washington.
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Find flight deals from United Kingdom to Washington

Enter your travel dates to find the best prices.

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 October 2025.

Fri 7/1107:45MAN - SEA
2 stops17h 15mMultiple Airlines
Sun 16/1114:35SEA - MAN
2 stops23h 20mMultiple Airlines
Deal found 30/10£446
Tue 16/1220:35LHR - SEA
1 stop28h 25mIcelandair
Wed 14/114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 29/10£452
Tue 2/1220:35LHR - SEA
1 stop28h 25mIcelandair
Tue 9/1214:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 30/10£456
Wed 26/1112:15LHR - SEA
1 stop12h 45mIcelandair
Wed 3/1214:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 29/10£458
Wed 12/1111:55LGW - SEA
1 stop13h 05mIcelandair
Tue 18/1114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 30/10£464
Wed 12/1112:15LHR - SEA
1 stop12h 45mIcelandair
Wed 19/1114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 30/10£467
Tue 11/1120:35LHR - SEA
1 stop28h 25mIcelandair
Mon 17/1114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 30/10£468
Tue 4/1120:35LHR - SEA
1 stop28h 25mIcelandair
Tue 11/1114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 29/10£469
Mon 17/1112:10LHR - SEA
1 stop14h 10mAer Lingus
Sun 30/1120:05SEA - LHR
1 stop11h 30mAer Lingus
Deal found 29/10£472
Thu 13/1120:35LHR - SEA
1 stop28h 25mIcelandair
Wed 26/1114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 29/10£479
Tue 2/1220:35LHR - SEA
1 stop28h 25mIcelandair
Sat 6/1214:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 30/10£481
Thu 4/1206:00LTN - SEA
1 stop19h 00mMultiple Airlines
Mon 8/1214:35SEA - LTN
1 stop15h 25mMultiple Airlines
Deal found 30/10£481

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 October 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

LTN - SEA

LTNSEA

London Luton

Thu 4/12

06:00-17:00

1 stop19h 00m

Seattle/Tacoma Intl

Mon 8/12

14:35-14:00

1 stop15h 25m

£483

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 22/3

08:40-12:35

1 stop34h 55m

Seattle/Tacoma Intl

Mon 30/3

20:25-14:15

Nonstop9h 50m

£489

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 24/2

11:45-11:40

1 stop31h 55m

Seattle/Tacoma Intl

Wed 4/3

16:45-10:30

Nonstop9h 45m

£496

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 26/2

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Mon 9/3

17:40-10:30

Nonstop9h 50m

£496

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 22/3

11:55-18:00

1 stop13h 05m

Seattle/Tacoma Intl

Sat 28/3

19:00-14:40

1 stop11h 40m

£497

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 25/2

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Fri 6/3

16:45-10:30

Nonstop9h 45m

£502

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 7/2

14:55-16:55

Nonstop10h 00m

Seattle/Tacoma Intl

Sun 22/2

07:00-06:50

1 stop15h 50m

£505

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 11/2

14:55-16:55

Nonstop10h 00m

Seattle/Tacoma Intl

Mon 23/2

18:50-12:20

Nonstop9h 30m

£505

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 16/12

10:05-18:55

1 stop16h 50m

Seattle/Tacoma Intl

Wed 14/1

18:50-12:20

Nonstop9h 30m

£506

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 22/2

12:20-14:45

Nonstop10h 25m

Seattle/Tacoma Intl

Mon 9/3

17:40-10:30

Nonstop9h 50m

£509

Flights are sorted by cheapest return flights first.

Deals found on 30/10

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, March is the cheapest month in which you can book a flight from United Kingdom to State of Washington (average of £311). Flying from United Kingdom to State of Washington in August is currently the most expensive (average of £468). 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 October 2025.

When flying from United Kingdom to State of Washington, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 9% versus a flight at midday.

What is the cheapest day to fly from United Kingdom to State of Washington?

Use this chart to determine the cheapest time to fly return from United Kingdom to Washington. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their United Kingdom to State of Washington flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 2025.
Get a feel of what it's like to fly with KLM, Virgin Atlantic, andAir France from the United Kingdom to Washington by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,406 reviews
Check prices

Comfort

7.7

Boarding

7.8

Food

7.3

Overall

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,406 reviews
KLM
7.7
Good
1,406 reviews
Check prices

Comfort

7.7

Boarding

7.8

Food

7.3

Overall

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
671 reviews
KLM
7.7
Good
1,406 reviews
Check prices

Comfort

7.7

Boarding

7.8

Food

7.3

Overall

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Air France
7.4
Good
1,482 reviews
KLM
7.7
Good
1,406 reviews
Check prices

Comfort

7.7

Boarding

7.8

Food

7.3

Overall

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Icelandair
7.1
Good
562 reviews
KLM
7.7
Good
1,406 reviews
Check prices

Comfort

7.7

Boarding

7.8

Food

7.3

Overall

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,488 reviews
KLM
7.7
Good
1,406 reviews
Check prices

Comfort

7.7

Boarding

7.8

Food

7.3

Overall

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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.

  • How long is the flight from United Kingdom to State of Washington?

    Delta, Icelandair, and British Airways can get you from United Kingdom to State of Washington in just under 10h. Your travel time can differ by up to 24h 55m. There are 4783 mi between United Kingdom and State of Washington. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from United Kingdom to State of Washington one-way?

    £389 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on Lufthansa and Delta, with prices starting from £401 and £423, 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, March is the cheapest month in which you can book a flight from United Kingdom to State of Washington (average of £311). Flying from United Kingdom to State of Washington in August is currently the most expensive (average of £468). 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

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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.
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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 October 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£332Average£622FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£393Average£737FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£405Average£607FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£407Average£600FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest£411Average£649FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£413Average£663FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£431Average£660FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Scandinavian AirlinesCheapest£449Average£648FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Virgin AtlanticCheapest£450Average£670FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapest£453Average£716FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights helps you search for flights from United Kingdom to Washington via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from United Kingdom to Washington.

Can Cheapflights find flights from United Kingdom to Washington with no change fees?

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?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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