Cheap flights from London Heathrow Airport to Washington, D.C. from £341

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 13/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — WAS
1 nov — 8 nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. are usually found in September or February, booked 44 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Heathrow to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 ottobre 2025.

Round-trip from

£391

One-way from

£341

Popular in

July

Cheapest in

September

Average price

£569

Good round-trip deal

£439 or less

Good one-way deal

£457 or less
Icelandair
  • Icelandair
  • 9/1-12/1
  • 2 total stops
  • 21h 25m total
  • London to Washington, D.C.
13/12
  • 13/12
  • 3 total stops
  • 35h 54m total
  • London to Washington, D.C.
Highest demand for flights based on searches. 10% potential increase in price (£48 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Average for round-trip flights in October 2025
Price to beat on a round-trip flight from London Heathrow to Washington, D.C. (WAS).
Price to beat on a one-way flight from London Heathrow to Washington, D.C. (WAS).

Find flight deals from Heathrow to Washington, D.C.

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Washington, D.C.
Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 ottobre 2025.

mer 8/1006:00LHR - IAD
1 stop13h 35mAustrian Airlines
dom 19/1018:40IAD - LHR
Nonstop7h 15mAustrian Airlines
Deal found 30/9£391
mar 28/1009:00LHR - IAD
1 stop12h 40mUnited Airlines
sab 8/1122:15IAD - LHR
Nonstop7h 35mUnited Airlines
Deal found 29/9£392
gio 6/1109:00LHR - DCA
2 stops17h 56mAir Canada
dom 30/1116:10DCA - LHR
1 stop10h 00mAir Canada
Deal found 30/9£392
mer 8/1008:40LHR - IAD
1 stop12h 35mUnited Airlines
gio 23/1012:35IAD - LHR
1 stop12h 20mUnited Airlines
Deal found 30/9£393
mer 5/1118:30LHR - IAD
1 stop25h 45mTAP AIR PORTUGAL
lun 10/1117:30IAD - LHR
1 stop14h 10mTAP AIR PORTUGAL
Deal found 29/9£393
sab 1/1109:00LHR - IAD
1 stop12h 40mUnited Airlines
dom 9/1120:30IAD - LHR
1 stop11h 30mUnited Airlines
Deal found 29/9£394
sab 22/1109:00LHR - DCA
2 stops17h 56mAir Canada
ven 28/1111:05DCA - LHR
2 stops16h 00mAir Canada
Deal found 29/9£394
mer 5/1111:10LHR - IAD
1 stop13h 55mUnited Airlines
dom 23/1117:33IAD - LHR
1 stop11h 52mUnited Airlines
Deal found 29/9£395
ven 31/1008:40LHR - DCA
2 stops17h 03mVirgin Atlantic
ven 28/1107:30DCA - LHR
1 stop17h 50mVirgin Atlantic
Deal found 30/9£395
mer 29/1007:40LHR - IAD
1 stop12h 55mLufthansa
mar 4/1122:15IAD - LHR
Nonstop7h 35mLufthansa
Deal found 30/9£396
mer 29/1006:50LHR - DCA
2 stops13h 06mAir Canada
mer 5/1116:10DCA - LHR
1 stop10h 00mAir Canada
Deal found 29/9£396
mer 29/1011:30LHR - IAD
1 stop13h 45mUnited Airlines
sab 8/1106:00IAD - LHR
1 stop9h 35mUnited Airlines
Deal found 29/9£396

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Washington, D.C. 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 2 ottobre 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Washington, D.C. that are best for you.

Fly from

Heathrow

Fly to

Washington, D.C.

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

ven 9/1

12:15-18:30

1 stop11h 15m

Washington, D.C. Dulles Intl

lun 12/1

19:40-10:50

1 stop10h 10m

£391

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

ven 9/1

12:15-18:30

1 stop11h 15m

Washington, D.C. Dulles Intl

dom 11/1

19:40-19:30

1 stop18h 50m

£391

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

ven 9/1

12:15-18:30

1 stop11h 15m

Washington, D.C. Dulles Intl

mar 13/1

19:40-10:50

1 stop10h 10m

£391

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mar 4/11

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

ven 14/11

22:15-10:50

Nonstop7h 35m

£393

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

sab 8/11

19:25-14:40

1 stop24h 15m

Washington, D.C. Dulles Intl

mar 25/11

18:20-06:40

Nonstop7h 20m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

dom 18/1

13:30-20:15

1 stop11h 45m

Washington, D.C. Dulles Intl

dom 25/1

13:15-07:10

1 stop12h 55m

£396

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

ven 7/11

06:50-14:35

1 stop12h 45m

Washington, D.C. Dulles Intl

lun 10/11

18:20-06:40

Nonstop7h 20m

£397

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

dom 23/11

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

sab 21/2

08:15-06:30

2 stops17h 15m

£397

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

gio 20/11

08:30-21:24

2 stops17h 54m

Baltimore/Washington

gio 27/11

10:56-06:20

2 stops14h 24m

£402

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

mer 29/10

07:30-21:24

2 stops17h 54m

Baltimore/Washington

mer 5/11

10:56-05:55

1 stop13h 59m

£407

Flights are sorted by cheapest return flights first.

Deals found on 1/10

Showing 1-10 of 60 results
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Best time to book a flight from Heathrow to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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, D.C.

How far ahead should I book a flight from London Heathrow Airport to Washington, D.C.?

Use this chart to determine the optimal time to book a return flight from Heathrow to Washington, D.C.. Price data was last updated on 26 September 2025.

The best time to book flights from London Heathrow Airport to Washington, D.C. is 44 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C.?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of £599). Flying from London Heathrow Airport to Washington, D.C. in July is currently the most expensive (average of £947). 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 WAS?

Find hourly flight availability from Heathrow to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 ottobre 2025.

When flying from London Heathrow Airport to Washington, D.C., 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 20% versus a flight in the afternoon.

What is the cheapest day to fly from London Heathrow Airport to Washington, D.C.?

Use this chart to determine the cheapest time to fly return from Heathrow to Washington, D.C.. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to Washington, D.C. flight should consider departing on Wednesday evenings 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.

Weekly flight availability from London Heathrow Airport to Washington, D.C.

Explore weekly flight availability from Heathrow to Washington, D.C.. 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 2 ottobre 2025.

The most flights from LHR to WAS are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

How much does it cost for a return flight from London Heathrow Airport to Washington, D.C.?

What’s the top stopover airport for flights from London Heathrow Airport to Washington, D.C.?

Share of one-stop return flights from London Heathrow Airport to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 29% of one-stop itineraries from London Heathrow Airport to Washington, D.C. on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Washington, D.C.?

Average return fare for one-stop flights from London Heathrow Airport to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £293.

What’s the fastest stopover option from London Heathrow Airport to Washington, D.C.?

Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Montreal (YUL) have the shortest average one-way travel time for one-stop routes: 10h 57m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Washington, D.C.?

Average stopover duration for one-stop one-way flights from London Heathrow Airport to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Zurich (ZRH) offer the fastest connection on this route, with an average stopover time of 1h 13m.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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, D.C.. Reviews last updated 2 ottobre 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Washington, D.C., such as Virgin Atlantic, Aer Lingus, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Overall

7.4

Crew

8.1

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Overall

7.4

Crew

8.1

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Overall

7.4

Crew

8.1

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Overall

7.4

Crew

8.1

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Overall

7.4

Crew

8.1

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Overall

7.4

Crew

8.1

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Washington, D.C.. 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 Washington, D.C.?

    For as low as £391, Icelandair can have you in Washington, D.C. from London Heathrow Airport in 11h 15m. There are 3664 mi between London Heathrow Airport and Washington, D.C.. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. round-trip?

    According to our current data, Delta (£188), TAP AIR PORTUGAL (£352), and Icelandair (£362) offers the cheapest pricing from London Heathrow Airport to Washington, D.C.. Delta is currently priced 67% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. one-way?

    The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as £370. However, be on the lookout for offers from Aer Lingus and Finnair, as they are both options that can get you from London Heathrow Airport to Washington, D.C. for a low price.

  • What are the most popular routes from London Heathrow Airport to Washington, D.C.?

  • What are the most reliable airlines from London Heathrow Airport to Washington, D.C.?

    Consider KLM (90%), Air France (90%) or Delta (90%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Washington, D.C..

  • What are the cheapest flights from London Heathrow Airport to Washington, D.C.?

    Looking for the cheapest flight from London Heathrow Airport to Washington, D.C.? While on average our users pay £1,253, our data indicates the cheapest price to be £384. The most popular route (London Heathrow - Washington, D.C. Dulles Intl), is priced around £341.

  • Where are the most common stopover locations when flying from London Heathrow Airport to Washington, D.C.?

  • What are some popular things to do or see while on a stopover in Dublin?

    Bord Gáis Energy Theatre, 3Olympia Theatre, and Dublin Castle are currently the most popular points of interest in Dublin at the moment. Those on a stopover in Dublin interested in visiting Bord Gáis Energy Theatre, 3Olympia Theatre, or Dublin Castle can do so by traveling 5.7 mi, 5.7 mi, and 5.8 mi, respectively from Dublin. Those looking to explore during their stopover in Dublin can hire a car from Dublin for about £22 per day.

  • Where are the least popular stopover locations for London Heathrow Airport to Washington, D.C. flights?

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

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

  • How can I find direct flights from Heathrow to Washington, D.C.?

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

  • Can I find deals for business class flights from Heathrow to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Heathrow to Washington, D.C. 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 Washington, D.C.?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of £599). Flying from London Heathrow Airport to Washington, D.C. in July is currently the most expensive (average of £947). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park
Tysons

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Fly from Heathrow to Washington, D.C. on these airlines

Choose from the following airlines for your flight from Heathrow to Washington, D.C.. Flights are based on user searches made on Cheapflights and were last updated on 2 ottobre 2025.

Top 10 airlines flying from Heathrow to Washington, D.C.

Discover the top 10 airlines that operate flights from Heathrow to Washington, D.C.. 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 2 ottobre 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£188Average£515FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
PLAYCheapest£273Average£391FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
TAP AIR PORTUGALCheapest£352Average£505FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£354Average£495FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£374Average£615FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Aer LingusCheapest£392Average£698FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£404Average£564FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£431Average£635FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£435Average£628FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£436Average£583FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines 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, D.C.?

Cheapflights makes it easy to find Heathrow to Washington, D.C. flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Washington, D.C.?

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 Washington, D.C. from Heathrow.

Can Cheapflights find flights from Heathrow to Washington, D.C. with no change fees?

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

Can Cheapflights notify me if prices for flights from Heathrow to Washington, D.C. become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Washington, D.C. flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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