Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Washington, D.C. to London Heathrow Airport from £183

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LHR
27 Feb — 6 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. to London Heathrow are usually found in February or August, booked 28 days in advance, depart on a Wednesday or Sunday and return on a Thursday

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

Enter your travel dates to find the best prices.

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

Fri 3/420:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Wed 8/421:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 27/1£379
Fri 3/420:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Sun 12/421:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 27/1£380
Sat 11/420:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Fri 17/421:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 26/1£381
Sat 4/420:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Tue 14/413:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 27/1£382
Wed 15/420:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Tue 5/513:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 26/1£382
Mon 2/219:40
IAD
-
LHR
1 stop10h 10m
Icelandair
Mon 9/220:35
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 26/1£383
Wed 11/320:40
IAD
-
LHR
1 stop10h 10m
Icelandair
Tue 17/312:15
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 27/1£384
Tue 3/219:40
IAD
-
LHR
1 stop18h 50m
Icelandair
Wed 18/220:35
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 26/1£384
Tue 24/320:40
IAD
-
LHR
1 stop10h 10m
Icelandair
Tue 31/321:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 26/1£385
Tue 3/219:40
IAD
-
LHR
1 stop10h 10m
Icelandair
Tue 10/220:35
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 27/1£386
Wed 18/222:30
IAD
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Mon 23/218:30
LHR
-
IAD
1 stop25h 05m
TAP AIR PORTUGAL
Deal found 26/1£387
Sun 15/219:40
IAD
-
LHR
1 stop10h 10m
Icelandair
Sat 21/220:35
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 27/1£387

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

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Heathrow (LHR). 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 28 January 2026.

Round-trip from

£379

One-way from

£183

Popular in

June

Cheapest in

February

Average price

£516

Good round-trip deal

£453 or less

Good one-way deal

£327 or less
Icelandair
  • Icelandair
  • 3/4-8/4
  • 2 total stops
  • 37h 20m total
  • Washington, D.C. to London
Search Deals
9/2
  • 9/2
  • 2 total stops
  • 37h 14m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£64 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to London Heathrow.
Search Deals
Price to beat on a one-way flight from Washington, D.C. (WAS) to London Heathrow.
Search Deals

Cheapflights Fare Finder

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

Fly from

Washington, D.C.

Fly to

Heathrow

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 26/4

20:20-16:25

2 stops15h 05m

London Heathrow

Sun 3/5

06:40-16:50

2 stops15h 10m

£447

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 11/2

18:20-06:40

Nonstop7h 20m

London Heathrow

Wed 18/2

06:50-14:35

1 stop12h 45m

£448

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 18/2

18:20-06:40

Nonstop7h 20m

London Heathrow

Wed 25/2

06:50-14:35

1 stop12h 45m

£448

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 16/2

18:20-06:40

Nonstop7h 20m

London Heathrow

Tue 31/3

06:55-19:25

1 stop17h 30m

£450

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 25/2

22:20-10:40

Nonstop7h 20m

London Heathrow

Sun 1/3

08:40-16:05

1 stop12h 25m

£451

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 5/3

22:20-10:40

Nonstop7h 20m

London Heathrow

Mon 16/3

08:40-17:05

1 stop12h 25m

£451

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 7/2

20:30-17:00

2 stops15h 30m

London Heathrow

Wed 18/2

21:05-17:15

2 stops25h 10m

£459

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 25/2

17:20-11:15

1 stop12h 55m

London Heathrow

Wed 4/3

06:35-21:17

2 stops19h 42m

£461

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sat 28/2

10:49-07:50

1 stop16h 01m

London Heathrow

Sun 8/3

08:40-23:59

2 stops19h 19m

£462

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 5/3

14:00-11:55

1 stop16h 55m

London Heathrow

Thu 12/3

10:00-22:36

2 stops16h 36m

£462

Flights are sorted by cheapest return flights first.

Deals found on 27/1

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Washington, D.C. to Heathrow

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

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

Use this chart to determine the optimal time to book a return flight from Washington, D.C. to Heathrow. Price data was last updated on 23 January 2026.

Booking 28 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £23). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £523). 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 WAS to LHR?

Find hourly flight availability from Washington, D.C. 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 January 2026.

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

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

Explore weekly flight availability from Washington, D.C. 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 January 2026.

The most flights from WAS to LHR are scheduled on a Tuesday (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (22 on average).

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

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

Dublin (DUB) – chosen by Cheapflights users on 49% of one-stop itineraries from Washington, D.C. to London Heathrow Airport on Cheapflights.

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

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

Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £392.

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

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 25m.

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

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

Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 1h 35m.

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

About 21% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 162 minutes.

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

Historically, flights departing at night 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?

Monday 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 Washington, D.C. to London flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 15% of flights being delayed.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 28 January 2026.
Get a feel of what it's like to fly with Virgin Atlantic, United Airlines, andAer Lingus from Washington, D.C. to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Boarding

7.7

Crew

8.2

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.6

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!
Virgin Atlantic
7.5
Good
678 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Boarding

7.7

Crew

8.2

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.6

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!
United Airlines
7.4
Good
9,206 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Boarding

7.7

Crew

8.2

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.6

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!
Aer Lingus
7.2
Good
1,442 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Boarding

7.7

Crew

8.2

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.6

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!
Icelandair
7.1
Good
603 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Boarding

7.7

Crew

8.2

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.6

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!
British Airways
6.7
Okay
7,704 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Boarding

7.7

Crew

8.2

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.6

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 Washington, D.C. 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 Washington, D.C. to London Heathrow Airport?

    Scandinavian Airlines, United Airlines, and KLM can get you from Washington, D.C. to London Heathrow Airport in just under 7h 20m. Your travel time can differ by up to 7h 45m. The distance between Washington, D.C. and London Heathrow Airport is about 3664 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 flying from Washington, D.C. to London Heathrow Airport round-trip?

    Currently priced at £302, Lufthansa will fly you from Washington, D.C. to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and Virgin Atlantic - these airlines can fly you to your destination from £360 and £373, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 45% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as £155 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Virgin Atlantic from £256 and British Airways from £260 one-way.

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

    Most travelers choose Washington, D.C. Dulles Intl - London Heathrow, Baltimore/Washington - London Heathrow or Washington, D.C. Reagan-National - London Heathrow when deciding on the best route from Washington, D.C. to London Heathrow Airport.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. to London Heathrow Airport consider choosing American Airlines (84%), Aer Lingus (84%) or Finnair (84%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from Washington, D.C. to London Heathrow Airport is generally £474, our data shows the cheapest flight currently is £280. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £300 for that flight.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £23). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £523). 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
Luton
Croydon
Wembley
Northampton
Gatwick
Slough
Hounslow
Ilford
Brentford
Hayes
Watford
Colchester
Guildford
Swindon
Chelmsford
Bedford
Crawley
Kingston upon Thames
Eastbourne

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.

Top 8 airlines flying from Washington, D.C. to Heathrow

Discover the top 8 airlines that operate flights from Washington, D.C. 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 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£302Average£481FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£360Average£526FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£373Average£578FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£377Average£538FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£388Average£538FlexibilityNo cancel feeOn-time77%
Search Air France flights
IberiaCheapest£447Average£505FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£482Average£611FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£499Average£703FlexibilityNo cancel feeOn-time71%
Search American 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 Washington, D.C. to Heathrow?

When you search for this flight from Washington, D.C. to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to Heathrow from Washington, D.C. by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

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

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

Not ready to book yet? You can track prices for flights from Washington, D.C. to Heathrow 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.