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Cheap flights from London Heathrow Airport to Washington, D.C. from £336

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 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — WAS
22 Apr — 29 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. are usually found in January or September, booked 21 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap 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 23 March 2026.

Wed 22/408:40
LHR
-
DCA
1 stop14h 06m
JetBlue
Sat 25/406:00
DCA
-
LHR
1 stop9h 45m
JetBlue
Deal found 18/3£412
Fri 5/617:05
LHR
-
IAD
Nonstop8h 15m
British Airways
Sat 13/619:15
IAD
-
LHR
Nonstop7h 30m
British Airways
Deal found 19/3£414
Fri 21/817:05
LHR
-
IAD
Nonstop8h 15m
British Airways
Mon 31/819:15
IAD
-
LHR
Nonstop7h 30m
British Airways
Deal found 20/3£415
Tue 28/406:00
LHR
-
IAD
1 stop13h 35m
Multiple Airlines
Mon 4/518:25
IAD
-
LHR
Nonstop7h 30m
Multiple Airlines
Deal found 20/3£416
Sat 22/809:15
LHR
-
IAD
1 stop12h 15m
American Airlines
Wed 2/917:20
IAD
-
LHR
1 stop14h 30m
American Airlines
Deal found 20/3£418
Fri 21/813:00
LHR
-
DCA
1 stop13h 26m
American Airlines
Mon 31/813:49
DCA
-
LHR
1 stop14h 16m
American Airlines
Deal found 20/3£418
Wed 15/413:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Sun 19/420:30
IAD
-
LHR
1 stop18h 50m
Icelandair
Deal found 20/3£418
Mon 24/809:15
LHR
-
DCA
1 stop14h 26m
American Airlines
Sun 30/817:45
DCA
-
LHR
1 stop13h 30m
American Airlines
Deal found 20/3£421
Mon 13/406:00
LHR
-
IAD
1 stop14h 15m
Multiple Airlines
Sun 19/422:10
IAD
-
LHR
Nonstop7h 30m
Multiple Airlines
Deal found 19/3£424
Thu 12/1108:25
LHR
-
IAD
1 stop13h 05m
British Airways
Thu 19/1118:20
IAD
-
LHR
Nonstop7h 10m
British Airways
Deal found 20/3£425
Fri 5/612:35
LHR
-
IAD
Nonstop8h 15m
British Airways
Thu 11/617:40
IAD
-
LHR
Nonstop7h 40m
British Airways
Deal found 19/3£427
Wed 29/408:40
LHR
-
DCA
1 stop14h 06m
JetBlue
Sat 2/506:00
DCA
-
LHR
1 stop9h 45m
JetBlue
Deal found 18/3£429

Find 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 23 March 2026.

Round-trip from

£412

One-way from

£336

Popular in

July

Cheapest in

January

Average price

£514

Good round-trip deal

£461 or less

Good one-way deal

£559 or less
JetBlue
  • JetBlue
  • 22/4-25/4
  • 2 total stops
  • 23h 51m total
  • London to Washington, D.C.
Search Deals
28/4
  • 28/4
  • 3 total stops
  • 37h 09m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£56 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 March 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from London Heathrow to Washington, D.C. (WAS).
Search Deals

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 23 March 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 16/9

08:40-16:45

1 stop13h 05m

Washington, D.C. Dulles Intl

Wed 30/9

18:35-06:55

Nonstop7h 20m

£447

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 11/4

09:05-14:35

1 stop34h 30m

Washington, D.C. Dulles Intl

Tue 21/4

18:25-06:55

Nonstop7h 30m

£448

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 13/5

17:05-20:20

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sun 17/5

22:25-10:50

Nonstop7h 25m

£475

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 11/4

16:40-19:55

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sun 19/4

22:10-10:40

Nonstop7h 30m

£475

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 13/5

12:15-15:30

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sun 17/5

21:50-10:40

Nonstop7h 50m

£475

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 23/4

12:15-15:30

Nonstop8h 15m

Washington, D.C. Dulles Intl

Wed 29/4

18:25-06:55

Nonstop7h 30m

£475

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 8/5

16:40-20:15

Nonstop8h 35m

Washington, D.C. Dulles Intl

Mon 18/5

18:25-06:55

Nonstop7h 30m

£475

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 15/4

14:05-21:55

1 stop12h 50m

Washington, D.C. Reagan-National

Tue 21/4

16:30-08:20

1 stop10h 50m

£477

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 30/4

07:45-21:02

2 stops18h 17m

Baltimore/Washington

Mon 4/5

11:00-11:55

1 stop19h 55m

£478

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 21/4

10:30-16:45

1 stop11h 15m

Washington, D.C. Reagan-National

Tue 12/5

17:31-09:10

1 stop10h 39m

£479

Flights are sorted by cheapest return flights first.

Deals found on 20/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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 13 March 2026.

The best time to book flights from London Heathrow Airport to Washington, D.C. is 21 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of £370). Flying from London Heathrow Airport to Washington, D.C. in July is currently the most expensive (average of £461). 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 23 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Washington, D.C. as you normally would.

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 23 March 2026.

The most flights from LHR to WAS are scheduled on a Friday (34 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (22 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.

Dublin (DUB) – chosen by Cheapflights users on 27% 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.

Shannon (SNN) is the most affordable one-stop option, with an average return flight price of £340.

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 Toronto (YYZ) have the shortest average one-way travel time for one-stop routes: 11h 08m.

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 Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 11m.

How often are flights from London to Washington, D.C. delayed?

About 17% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 130 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 10% of flights being delayed.

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 23 March 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Washington, D.C., such as Austrian Airlines,Virgin Atlantic, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
902 reviews
Check prices

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Austrian Airlines
7.6
Good
902 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Virgin Atlantic
7.5
Good
683 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
United Airlines
7.4
Good
9,458 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Lufthansa
6.8
Okay
7,862 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
British Airways
6.7
Okay
7,811 reviews
Austrian Airlines
7.6
Good
902 reviews
Check prices

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

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 £475, United Airlines can have you in Washington, D.C. from London Heathrow Airport in 8h 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 (£190), United Airlines (£333), and TAP AIR PORTUGAL (£333) offers the cheapest pricing from London Heathrow Airport to Washington, D.C.. Delta is currently priced 64% 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 TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £349. However, be on the lookout for offers from JetBlue and Aer Lingus, 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.?

    When deciding which route to take from London Heathrow Airport to Washington, D.C. consider London Heathrow - Washington, D.C. Dulles Intl, London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National as they are the most popular.

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

    Consider Air Canada (89%), Austrian Airlines (89%) or Copa Airlines (89%) 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 £1,495, our data indicates the cheapest price to be £409. The most popular route (London Heathrow - Washington, D.C. Dulles Intl), is priced around £317.

  • 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of £370). Flying from London Heathrow Airport to Washington, D.C. in July is currently the most expensive (average of £461). 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
Gaithersburg
Woodbridge
Arlington
Alexandria

Browse thousands of different options on Cheapflights for your next trip

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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 23 March 2026.
British Airways flights from London Heathrow to Washington, D.C.
Virgin Atlantic flights from London Heathrow to Washington, D.C.
Finnair flights from London Heathrow to Washington, D.C.

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 23 March 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£190Average£579FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
PLAYCheapest£304Average£406FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
United AirlinesCheapest£333Average£543FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
TAP AIR PORTUGALCheapest£333Average£453FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£336Average£468FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£366Average£735FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
KLMCheapest£379Average£568FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest£401Average£595FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapest£409Average£588FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£412Average£550FlexibilityNo 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 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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