Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Washington from £390

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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
9 Sep — 16 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Washington
Explore the most affordable flight options available from Heathrow to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 August 2026.

Wed 9/912:25 -
1 stop16h 11m
Sat 8/521:50 -
Nonstop9h 45m
Deal found 5/8£448
Mon 21/921:25 -
1 stop31h 15m
Mon 28/915:40 -
1 stop12h 15m
Deal found 7/8£450
Fri 11/911:45 -
1 stop19h 35m
Sat 8/521:50 -
Nonstop9h 45m
Deal found 5/8£453
Tue 20/1013:05 -
1 stop15h 35m
Tue 27/1015:35 -
1 stop12h 15m
Deal found 5/8£457
Wed 4/1112:15 -
1 stop12h 45m
Tue 17/1108:18 -
2 stops15h 47m
Deal found 8/8£459
Tue 6/1013:05 -
1 stop15h 35m
Tue 20/1019:00 -
1 stop17h 20m
Deal found 5/8£465
Wed 14/1013:05 -
1 stop12h 50m
Wed 21/1015:40 -
1 stop12h 15m
Deal found 6/8£466
Sat 29/813:05 -
2 stops31h 15m
Sun 30/817:26 -
1 stop29h 19m
Deal found 7/8£467
Wed 21/1013:05 -
1 stop12h 50m
Thu 5/1114:35 -
1 stop12h 15m
Deal found 6/8£468
Wed 28/1012:15 -
1 stop12h 45m
Thu 5/1114:35 -
1 stop12h 15m
Deal found 8/8£468
Mon 9/1112:15 -
1 stop12h 45m
Mon 11/108:21 -
2 stops15h 44m
Deal found 6/8£469
Sun 30/821:25 -
1 stop22h 20m
Mon 7/915:40 -
1 stop12h 15m
Deal found 7/8£470

Find flight deals from Heathrow to Washington

Keep the following information in mind while searching for Heathrow to Washington flight deals. Data was last updated 10 August 2026.

Round-trip from

£448

One-way from

£390

Popular in

December

Cheapest in

February

Average price

£619

Good round-trip deal

£575 or less

Good one-way deal

£568 or less
Delta
  • Delta
  • 9/9-8/5
  • 1 total stop
  • 25h 56m total
  • London to Washington
Search Deals
4/11
  • 4/11
  • 3 total stops
  • 35h 30m total
  • London to Washington
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Washington.
Search Deals
Price to beat on a one-way flight from London Heathrow to Washington.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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 10 August 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Tue 15/9

07:25-19:15

2 stops19h 50m

Seattle/Tacoma Intl

Tue 22/9

07:00-07:55

2 stops16h 55m

£532

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Sat 17/10

17:45-20:14

Nonstop10h 29m

Seattle/Tacoma Intl

Sat 31/10

17:45-10:40

Nonstop9h 55m

£552

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Mon 14/9

11:25-23:26

2 stops20h 01m

Seattle/Tacoma Intl

Mon 21/9

12:44-09:40

1 stop12h 56m

£557

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Wed 23/12

09:30-12:00

1 stop34h 30m

Seattle/Tacoma Intl

Mon 28/12

07:00-06:40

2 stops15h 40m

£579

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Fri 11/9

19:30-17:09

2 stops29h 39m

Spokane

Sat 26/9

11:10-17:40

2 stops22h 30m

£585

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Mon 7/9

06:30-16:37

2 stops18h 07m

Seattle/Tacoma Intl

Sun 13/9

23:08-06:45

1 stop23h 37m

£588

LondonBellingham

LHR London Heathrow - BLI Bellingham

LHRBLI

London Heathrow

Wed 14/10

17:00-23:53

1 stop14h 53m

Bellingham

Sat 17/10

19:18-15:05

1 stop11h 47m

£598

LondonPasco

LHR London Heathrow - PSC Pasco Tri Cities

LHRPSC

London Heathrow

Sat 12/9

06:40-22:44

3 stops24h 04m

Pasco Tri Cities

Sat 19/9

12:36-18:50

3 stops22h 14m

£605

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Wed 2/9

10:50-16:59

1 stop14h 09m

Seattle/Tacoma Intl

Wed 16/9

08:40-21:20

2 stops28h 40m

£605

LondonBellingham

LHR London Heathrow - BLI Bellingham

LHRBLI

London Heathrow

Wed 23/9

17:00-23:44

1 stop14h 44m

Bellingham

Wed 30/9

14:06-15:05

1 stop16h 59m

£626

Flights are sorted by cheapest return flights first.

Deals found on 8/8

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Heathrow to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Heathrow 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 London Heathrow Airport to Washington

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

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of £502). Flying from London Heathrow Airport to State of Washington in December is currently the most expensive (average of £685). 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 LHR to WA?

Find hourly flight availability from Heathrow 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 10 August 2026.

When flying from London Heathrow Airport 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 Heathrow Airport to State of Washington

Explore weekly flight availability from Heathrow 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 10 August 2026.

The most flights from LHR to USWA are scheduled on a Tuesday (24 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (23 on average).

How much does it cost for a return flight from London Heathrow Airport to State of Washington?

Airfare is below average for this route at the moment.
London Heathrow Airport to State of Washington flights typically cost between £522 and £679 in September.
The cheapest return price found within the last 5 days was £448 on Delta (9 Sept–8 May).

How far ahead should I book a flight from London Heathrow Airport to State of Washington?

The price you pay for your flight from London Heathrow Airport to State of Washington may vary depending on when you book. For the best chance of a lower fare, look to book 56 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 10 August 2026.
Get a feel of what it's like to fly with Alaska Airlines,KLM, andVirgin Atlantic from London Heathrow Airport 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.
Alaska Airlines
7.9
Good
12,791 reviews
Check prices

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,791 reviews
Alaska Airlines
7.9
Good
12,791 reviews
Check prices

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
KLM
7.8
Good
1,555 reviews
Alaska Airlines
7.9
Good
12,791 reviews
Check prices

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Virgin Atlantic
7.5
Good
694 reviews
Alaska Airlines
7.9
Good
12,791 reviews
Check prices

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Icelandair
6.9
Okay
728 reviews
Alaska Airlines
7.9
Good
12,791 reviews
Check prices

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
British Airways
6.7
Okay
8,153 reviews
Alaska Airlines
7.9
Good
12,791 reviews
Check prices

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

Related info for your journey

Find useful and relevant information for your journey from Heathrow 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 London Heathrow Airport to State of Washington?

    United Airlines, Delta, and Scandinavian Airlines can get you from London Heathrow Airport to State of Washington in just under 10h 29m. Your travel time can differ by up to 19h 10m. The distance from London Heathrow Airport to State of Washington is about 4783 mi. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as £333 on British Airways. Other airlines that offer cheap prices include Icelandair from £351 and Virgin Atlantic from £364 one-way.

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

    When deciding which route to take from London Heathrow Airport to State of Washington consider London Heathrow - Seattle/Tacoma Intl, London Heathrow - Portland or London Heathrow - Spokane as they are the most popular.

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

    The top 3 most reliable airlines when flying from London Heathrow Airport to State of Washington are Scandinavian Airlines (85%), KLM (77%) and Air France (77%).

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

    Looking for the cheapest flight from London Heathrow Airport to State of Washington? While on average our users pay £1,568, our data indicates the cheapest price to be £345. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £410.

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

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

  • How can I find direct flights from Heathrow to Washington?

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow Airport to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of £502). Flying from London Heathrow Airport to State of Washington in December is currently the most expensive (average of £685). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
London City to John F Kennedy Intl flights
Stansted to John F Kennedy Intl flights
Gatwick to Newark flights
Heathrow to Orlando flights
Heathrow to Miami flights
Luton to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Gatwick to LaGuardia flights
Stansted to Newark flights
Heathrow to Boston flights
Luton to Newark flights
London City to Newark flights
Gatwick to Orlando flights
Heathrow to Las Vegas flights
Heathrow to San Francisco flights
Heathrow to O'Hare Intl flights
Heathrow to Dulles Intl flights
Heathrow to Dallas/Fort Worth flights
Stansted to Orlando flights
Heathrow to Atlanta flights
Gatwick to Miami flights
London City to Miami flights
Gatwick to Los Angeles flights
Heathrow to Hobby flights
Stansted to Miami flights
London City to Orlando flights
Heathrow to Seattle flights
Heathrow to Baltimore flights
Gatwick to Boston flights
London City to Los Angeles flights
Stansted to Los Angeles flights
Heathrow to Tampa flights
London City to Boston flights
Heathrow to George Bush Intcntl flights
Luton to Miami flights
Gatwick to Las Vegas flights
Luton to Los Angeles flights
Luton to Orlando flights
Stansted to Boston flights
Gatwick to Fort Lauderdale flights
Gatwick to O'Hare Intl flights
Gatwick to San Francisco flights
Heathrow to Nashville flights
Heathrow to Ontario flights
London City to O'Hare Intl flights
London City to San Francisco flights

Top 10 airlines flying from Heathrow to Washington

Discover the top 10 airlines that operate flights from Heathrow 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 10 August 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£333Average£421FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£339Average£491FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£389Average£631FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£415Average£486FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£421Average£753FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£431Average£605FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest£439Average£641FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air FranceCheapest£448Average£623FlexibilityNo cancel feeOn-time77%
Search Air France flights
British AirwaysCheapest£452Average£628FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£458Average£667FlexibilityNo cancel feeOn-time76%
Search Finnair 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 Heathrow to Washington?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Washington from Heathrow today with Cheapflights!

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

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Washington for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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

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

Not ready to book yet? You can track prices for flights from Heathrow to Washington on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

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.