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Cheap flights from Washington to London Heathrow Airport from £83

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
28 Jul — 4 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Washington to Heathrow
Explore the most affordable flight options available from Washington to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 June 2026.

Thu 17/915:25
PSC
-
LHR
1 stop36h 45m
Virgin Atlantic
Sat 3/1010:55
LHR
-
PSC
1 stop13h 48m
Virgin Atlantic
Deal found 23/6£414
Fri 18/912:28
PSC
-
LHR
2 stops43h 07m
Virgin Atlantic
Sat 3/1009:40
LHR
-
PSC
2 stops20h 24m
Virgin Atlantic
Deal found 23/6£416
Tue 20/1019:00
SEA
-
LHR
1 stop32h 55m
Icelandair
Tue 27/1020:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Deal found 26/6£538
Tue 25/815:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Tue 8/921:25
LHR
-
SEA
1 stop22h 20m
Icelandair
Deal found 26/6£540
Tue 25/815:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Sun 6/921:25
LHR
-
SEA
1 stop22h 20m
Icelandair
Deal found 26/6£541
Wed 30/919:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Thu 29/1012:15
LHR
-
SEA
1 stop12h 45m
Icelandair
Deal found 27/6£542
Sat 26/915:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Thu 8/1021:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Deal found 26/6£542
Wed 9/919:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Wed 23/921:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Deal found 26/6£543
Tue 18/823:25
SEA
-
LHR
1 stop28h 30m
Icelandair
Wed 30/921:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Deal found 27/6£544
Thu 20/819:00
SEA
-
LHR
2 stops18h 40m
Multiple Airlines
Wed 26/810:20
LHR
-
SEA
2 stops18h 20m
Multiple Airlines
Deal found 27/6£545
Sat 22/823:25
SEA
-
LHR
1 stop28h 30m
Icelandair
Mon 31/821:25
LHR
-
SEA
1 stop22h 20m
Icelandair
Deal found 27/6£546
Sun 13/919:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Sat 26/921:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Deal found 27/6£547

Find flight deals from Washington to Heathrow

Keep the following information in mind while searching for Washington to Heathrow flight deals. Data was last updated 28 June 2026.

Round-trip from

£414

One-way from

£83

Popular in

June

Cheapest in

January

Average price

£891

Good round-trip deal

£775 or less

Good one-way deal

£305 or less
Virgin Atlantic
  • Virgin Atlantic
  • 17/9-3/10
  • 2 total stops
  • 50h 33m total
  • Washington to London
Search Deals
Virgin Atlantic
  • Virgin Atlantic
  • 9/10
  • 1 total stop
  • 14h 05m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£133 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Washington to London Heathrow.
Search Deals
Price to beat on a one-way flight from Washington to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington to Heathrow 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 28 June 2026.
Use the filters below to find and compare flights from Washington to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

Wed 30/9

14:04-15:05

1 stop17h 01m

London Heathrow

Wed 14/10

17:00-23:52

1 stop14h 52m

£662

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

Mon 5/10

18:00-15:05

1 stop13h 05m

London Heathrow

Tue 13/10

17:00-23:52

1 stop14h 52m

£662

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 12/10

12:44-15:05

1 stop18h 21m

London Heathrow

Wed 28/10

14:45-11:39

1 stop27h 54m

£663

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 8/11

05:00-07:10

2 stops18h 10m

London Heathrow

Thu 12/11

06:35-21:05

2 stops22h 30m

£664

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 26/10

05:00-07:10

2 stops19h 10m

London Heathrow

Fri 30/10

06:35-21:01

2 stops21h 26m

£664

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 13/10

05:00-10:00

2 stops21h 00m

London Heathrow

Thu 22/10

08:45-22:16

2 stops21h 31m

£665

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sat 3/10

16:08-07:15

2 stops31h 07m

London Heathrow

Tue 27/10

06:35-21:01

2 stops21h 26m

£665

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 8/11

06:02-12:20

1 stop22h 18m

London Heathrow

Thu 12/11

14:45-23:59

1 stop17h 14m

£669

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 25/10

05:00-07:10

2 stops19h 10m

London Heathrow

Mon 2/11

11:10-21:05

2 stops41h 55m

£672

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

Mon 28/9

15:25-12:10

1 stop36h 45m

London Heathrow

Wed 7/10

11:45-23:38

2 stops19h 53m

£683

Flights are sorted by cheapest return flights first.

Deals found on 23/6

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington to Heathrow

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

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of £242). Flying from State of Washington to London Heathrow Airport in May is currently the most expensive (average of £437). 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 WA to LHR?

Find hourly flight availability from Washington to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 June 2026.

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

Explore weekly flight availability from Washington to Heathrow. 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 28 June 2026.

The most flights from USWA to LHR are scheduled on a Tuesday (23 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (14 on average).

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

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

The price you pay for your flight from State of Washington to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 64 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Related info for your journey

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

    Airlines like Alaska Airlines, United Airlines, and Virgin Atlantic fly from State of Washington to London Heathrow Airport in about 17h 01m. The time it takes to get you to your destination can typically vary by up to 19h 44m. State of Washington and London Heathrow Airport are separated by a distance of 4763 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    One-way options have recently been found by users for as low as £204 on Icelandair. Other airlines that offer cheap prices include Virgin Atlantic from £278 and British Airways from £311 one-way.

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

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

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from State of Washington to London Heathrow Airport on time: KLM (89%), Air France (89%), Delta (89%).

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

    The cheapest flight price from State of Washington to London Heathrow Airport is £270. On average you can expect to pay £696. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for £194.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of £242). Flying from State of Washington to London Heathrow Airport in May is currently the most expensive (average of £437). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Milton Keynes
Wembley
Luton
Gatwick
Croydon
Ilford
Slough
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Swindon
Eastbourne
Watford
Poole
Southall
Romford
Ipswich

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Newark to London City flights
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Dulles Intl to Gatwick flights
Los Angeles to Gatwick flights
Boston to London City flights
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Los Angeles to Stansted flights
Boston to Stansted flights
Philadelphia to Heathrow flights
Dulles Intl to London City flights
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San Francisco to Gatwick flights
Sky Harbor Intl to Heathrow flights
George Bush Intcntl to Heathrow flights
Los Angeles to London City flights
O'Hare Intl to Gatwick flights
Reagan-National to Gatwick flights
San Francisco to London City flights
San Francisco to Stansted flights
Orlando to Gatwick flights
O'Hare Intl to Stansted flights
Tampa to Heathrow flights
Charlotte to Heathrow flights
Dallas/Fort Worth to Gatwick flights
Minneapolis to Heathrow flights

Top 2 airlines flying from Washington to Heathrow

Discover the top 2 airlines that operate flights from Washington to Heathrow. 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 28 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£359Average£626FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£373Average£597FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 Washington to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Washington.

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

Need flexible booking options for your flight to Heathrow from Washington? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from Washington to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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