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Cheap flights from Washington to London Heathrow Airport from £208

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
19 Dec — 26 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Heathrow

Keep the following information in mind while searching for Washington to Heathrow flight deals. Data was last updated 19 November 2025.

Round-trip from

£424

One-way from

£208

Popular in

June

Cheapest in

October

Average price

£503

Good round-trip deal

£495 or less

Good one-way deal

£467 or less
Lufthansa
  • Lufthansa
  • 9/1-18/1
  • 3 total stops
  • 34h 06m total
  • Washington to London
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15/1
  • 15/1
  • 3 total stops
  • 33h 50m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£80 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Washington to London Heathrow.
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Price to beat on a one-way flight from Washington to London Heathrow.
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Find 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 19 November 2025.

Wed 19/1115:40SEA - LHR
1 stop12h 10mLufthansa
Wed 26/1106:35LHR - SEA
1 stop14h 45mLufthansa
Deal found 16/11£423
Mon 17/1116:48SEA - LHR
Nonstop9h 42mDelta
Wed 24/1206:20LHR - SEA
1 stop15h 05mDelta
Deal found 17/11£437
Tue 2/1216:48SEA - LHR
Nonstop9h 42mDelta
Thu 11/1206:30LHR - SEA
1 stop13h 20mDelta
Deal found 17/11£438
Wed 10/1220:05SEA - LHR
1 stop12h 45mAer Lingus
Mon 22/1208:50LHR - SEA
1 stop17h 30mAer Lingus
Deal found 17/11£439
Wed 26/1110:05SEA - LHR
2 stops16h 05mMultiple Airlines
Wed 3/1207:40LHR - SEA
1 stop13h 40mMultiple Airlines
Deal found 16/11£440
Wed 3/1210:05PDX - LHR
1 stop15h 55mVirgin Atlantic
Tue 9/1217:50LHR - PDX
1 stop25h 35mVirgin Atlantic
Deal found 16/11£442
Mon 1/1223:55SEA - LHR
1 stop23h 10mDelta
Thu 11/1206:30LHR - SEA
1 stop13h 20mDelta
Deal found 17/11£442
Sat 29/1119:00PDX - LHR
1 stop32h 50mUnited Airlines
Thu 11/1214:30LHR - PDX
1 stop26h 45mUnited Airlines
Deal found 17/11£442
Mon 1/1219:20SEA - LHR
Nonstop9h 30mMultiple Airlines
Tue 9/1212:20LHR - SEA
Nonstop10h 38mMultiple Airlines
Deal found 17/11£442
Sun 30/1114:35SEA - LHR
1 stop20h 55mIcelandair
Thu 4/1212:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 18/11£443
Tue 2/1215:15PDX - LHR
1 stop12h 35mUnited Airlines
Wed 10/1206:35LHR - PDX
2 stops35h 03mUnited Airlines
Deal found 17/11£444
Tue 18/1105:50SEA - LHR
2 stops20h 20mMultiple Airlines
Tue 25/1107:40LHR - SEA
2 stops19h 36mMultiple Airlines
Deal found 17/11£444

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 19 November 2025.
Use the filters below to find and compare flights from Washington to London Heathrow Airport that are best for you.

Fly from

Washington

Fly to

Heathrow

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 3/12

16:48-10:30

Nonstop9h 42m

London Heathrow

Wed 10/12

06:20-13:25

1 stop15h 05m

£437

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 2/2

19:20-12:50

Nonstop9h 30m

London Heathrow

Mon 9/2

06:30-11:40

1 stop13h 10m

£446

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 1/12

23:55-07:05

1 stop23h 10m

London Heathrow

Thu 11/12

06:20-20:50

2 stops22h 30m

£449

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 14/1

10:24-17:40

2 stops23h 16m

London Heathrow

Thu 29/1

06:40-22:20

2 stops23h 40m

£449

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 28/4

10:00-18:30

2 stops24h 30m

London Heathrow

Tue 5/5

07:05-21:35

2 stops22h 30m

£455

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

Wed 25/2

13:51-13:15

1 stop15h 24m

London Heathrow

Wed 4/3

12:30-22:38

1 stop18h 08m

£458

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

Wed 25/2

05:00-06:20

2 stops17h 20m

London Heathrow

Wed 4/3

08:20-20:27

2 stops20h 07m

£462

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Thu 8/1

16:45-10:30

Nonstop9h 45m

London Heathrow

Sun 18/1

06:30-11:50

1 stop13h 20m

£465

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 23/4

13:00-17:40

2 stops20h 40m

London Heathrow

Wed 29/4

10:20-22:22

2 stops20h 02m

£467

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Fri 9/1

16:45-10:30

Nonstop9h 45m

London Heathrow

Fri 16/1

12:20-14:49

Nonstop10h 29m

£467

Flights are sorted by cheapest return flights first.

Deals found on 16/11

Showing 1-10 of 60 results
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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, October is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of £378). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of £601). 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 19 November 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 20% on flights from State of Washington to London Heathrow Airport by exploring options for tickets in the afternoon.

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 19 November 2025.

The most flights from USWA to LHR are scheduled on a Tuesday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

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 Delta, KLM, and Scandinavian Airlines fly from State of Washington to London Heathrow Airport in about 9h 30m. The time it takes to get you to your destination can typically vary by up to 13h 46m. State of Washington and London Heathrow Airport are separated by a distance of 4783 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 £261 on Scandinavian Airlines. Other airlines that offer cheap prices include British Airways from £285 and Virgin Atlantic from £294 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 (86%), Delta (84%), Virgin Atlantic (84%).

  • 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 £391. On average you can expect to pay £530. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for £361.

  • 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, October is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of £378). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of £601). 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
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
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Watford
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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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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 19 November 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£360Average£606FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£376Average£626FlexibilityNo 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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