How long is the flight from Washington, D.C. to London Heathrow Airport?

Icelandair, Scandinavian Airlines, and United Airlines can get you from Washington, D.C. to London Heathrow Airport in just under 7h 35m. Your travel time can differ by up to 8h 15m. 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 £440, British Airways will fly you from Washington, D.C. to London Heathrow Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Icelandair - these airlines can fly you to your destination from £446 and £487, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 34% 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 £212 on Virgin Atlantic. Other airlines that offer cheap prices include British Airways from £241 and United Airlines from £292 one-way.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 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 £584, our data shows the cheapest flight currently is £225. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £451 for that flight.

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 SAUDIA (69%), Aer Lingus (68%) or Iberia (68%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Washington, D.C. to London Heathrow Airport?

British Airways, United Airlines and Virgin Atlantic are the most popular airlines when flying from Washington, D.C. to London Heathrow Airport.

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.

£211+ Cheap Flights from Washington, D.C. to London Heathrow Airport

Cheapflights Tip: The best prices from Washington, D.C. to London Heathrow are usually found in February or January, booked 86 days in advance, depart on a Monday or Tuesday and return on a Friday

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

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 2 September 2026.

Sat 21/1119:40 -

1 stop10h 10m

Sun 29/1112:15 -

1 stop11h 25m

Deal found 31/8£505

Mon 12/1020:30 -

2 stops20h 10m

Mon 19/1006:40 -

2 stops17h 45m

Deal found 28/8£505

Fri 27/1119:40 -

1 stop10h 10m

Fri 4/1212:15 -

1 stop11h 25m

Deal found 30/8£506

Fri 27/1119:40 -

1 stop10h 10m

Sat 12/1212:15 -

1 stop11h 25m

Deal found 31/8£509

Wed 18/1119:40 -

1 stop10h 10m

Thu 26/1112:15 -

1 stop11h 25m

Deal found 30/8£510

Tue 3/1119:40 -

1 stop10h 10m

Sun 8/1120:35 -

1 stop27h 05m

Deal found 31/8£511

Sat 17/1020:30 -

1 stop10h 25m

Sun 6/1212:15 -

1 stop11h 25m

Deal found 1/9£511

Mon 12/1020:30 -

1 stop10h 25m

Sun 6/1212:15 -

1 stop11h 25m

Deal found 30/8£512

Thu 22/1023:20 -

1 stop31h 35m

Sat 5/1212:15 -

1 stop11h 25m

Deal found 30/8£513

Thu 22/1023:20 -

1 stop31h 35m

Wed 28/1020:35 -

1 stop27h 05m

Deal found 1/9£514

Tue 13/1023:20 -

1 stop31h 35m

Wed 2/1220:35 -

1 stop27h 05m

Deal found 29/8£514

Thu 8/1020:20 -

2 stops15h 40m

Sat 17/1006:40 -

2 stops15h 20m

Deal found 31/8£518

Best flights from Washington, D.C. to Heathrow
Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 September 2026.

Tue 1/1219:40 -

1 stop10h 10m

Fri 18/1212:15 -

1 stop11h 25m

Deal found 31/8£512

Fri 29/112:30 -

2 stops15h 50m

Sun 7/218:40 -

1 stop27h 35m

Deal found 1/9£629

Mon 28/922:05 -

Nonstop7h 35m

Tue 6/1009:00 -

1 stop15h 25m

Deal found 30/8£630

Sun 11/1006:10 -

1 stop9h 35m

Thu 15/1008:40 -

1 stop11h 07m

Deal found 2/9£663

Sun 8/1118:55 -

Nonstop7h 25m

Sun 15/1106:30 -

1 stop14h 15m

Deal found 1/9£667

Wed 21/1015:15 -

1 stop10h 30m

Sun 25/1010:50 -

1 stop12h 43m

Deal found 1/9£699

Sun 25/1012:37 -

1 stop15h 08m

Sun 8/1111:20 -

2 stops17h 24m

Deal found 31/8£700

Fri 2/1021:30 -

Nonstop7h 20m

Mon 5/1015:00 -

1 stop12h 17m

Deal found 31/8£743

Fri 27/1116:00 -

2 stops13h 50m

Sat 5/1212:15 -

1 stop11h 25m

Deal found 2/9£754

Mon 28/920:30 -

1 stop18h 50m

Fri 9/1021:25 -

1 stop27h 00m

Deal found 30/8£621

Tue 13/1022:10 -

1 stop29h 25m

Tue 20/1012:10 -

1 stop33h 35m

Deal found 30/8£630

Wed 30/906:30 -

1 stop9h 15m

Sat 10/1008:40 -

1 stop12h 19m

Deal found 1/9£663

Thu 1/1020:20 -

2 stops18h 35m

Mon 5/1019:30 -

2 stops45h 20m

Deal found 31/8£673

Wed 7/1009:09 -

2 stops19h 51m

Wed 14/1006:50 -

2 stops16h 23m

Deal found 1/9£643

Thu 19/1112:18 -

2 stops15h 17m

Mon 23/1106:30 -

2 stops15h 54m

Deal found 1/9£722

Mon 12/1006:20 -

1 stop9h 25m

Tue 13/1008:40 -

1 stop13h 41m

Deal found 29/8£664

Sun 13/1211:55 -

2 stops16h 25m

Fri 18/1206:40 -

2 stops20h 24m

Deal found 28/8£685

Sun 27/908:25 -

1 stop21h 00m

Tue 6/1014:05 -

1 stop30h 35m

Deal found 30/8£644

Wed 16/919:25 -

Nonstop7h 20m

Wed 23/914:00 -

Nonstop8h 15m

Deal found 1/9£794

Fri 29/111:00 -

2 stops16h 05m

Sun 7/211:45 -

2 stops16h 10m

Deal found 1/9£725

Sat 12/1206:15 -

1 stop10h 25m

Tue 15/1212:20 -

1 stop15h 32m

Deal found 28/8£664

Tue 3/1122:15 -

Nonstop7h 35m

Thu 12/1112:05 -

Nonstop8h 35m

Deal found 31/8£652

Thu 15/1015:38 -

1 stop9h 52m

Mon 19/1008:40 -

1 stop12h 19m

Deal found 28/8£664

Wed 23/920:20 -

2 stops15h 40m

Fri 25/906:40 -

1 stop15h 20m

Deal found 2/9£732

Wed 30/912:02 -

2 stops14h 08m

Mon 5/1006:15 -

2 stops16h 11m

Deal found 1/9£742

Mon 7/1222:15 -

Nonstop7h 35m

Wed 9/1216:20 -

Nonstop8h 55m

Deal found 2/9£652

Fri 25/906:30 -

1 stop9h 15m

Sat 10/1008:40 -

1 stop16h 27m

Deal found 30/8£664

Thu 11/210:35 -

2 stops17h 45m

Mon 22/218:40 -

2 stops32h 15m

Deal found 1/9£777

Tue 6/1018:35 -

Nonstop7h 20m

Thu 12/1116:20 -

Nonstop8h 55m

Deal found 28/8£652

Tue 10/1110:39 -

1 stop15h 16m

Tue 13/411:55 -

1 stop16h 04m

Deal found 30/8£667

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

Round-trip from	£505
One-way from	£211
Popular in	June
Cheapest in	February
Average price	£686
Good round-trip deal	£689 or less
Good one-way deal	£339 or less

Icelandair
21/11-29/11
2 total stops
21h 35m total
Washington, D.C. to London

Search Deals

Icelandair
13/10
1 total stop
31h 35m total
Washington, D.C. to London

Search Deals

Highest demand for flights based on searches. 20% potential increase in price (£124 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 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

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BaltimoreLondon

BWI Baltimore/Washington - LHR London Heathrow

BWILHR

Baltimore/Washington

Tue 1/12

19:40-10:50

1 stop10h 10m

London Heathrow

Fri 18/12

12:15-18:40

1 stop11h 25m

£512

BaltimoreLondon

BWI Baltimore/Washington - LHR London Heathrow

BWILHR

Baltimore/Washington

Mon 28/9

20:30-20:20

1 stop18h 50m

London Heathrow

Fri 9/10

21:25-19:25

1 stop27h 00m

£621

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Fri 29/1

12:30-09:20

2 stops15h 50m

London Heathrow

Sun 7/2

18:40-17:15

1 stop27h 35m

£629

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Mon 28/9

22:05-10:40

Nonstop7h 35m

London Heathrow

Tue 6/10

09:00-19:25

1 stop15h 25m

£630

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Tue 13/10

22:10-08:35

1 stop29h 25m

London Heathrow

Tue 20/10

12:10-16:45

1 stop33h 35m

£630

BaltimoreLondon

BWI Baltimore/Washington - LHR London Heathrow

BWILHR

Baltimore/Washington

Wed 7/10

09:09-10:00

2 stops19h 51m

London Heathrow

Wed 14/10

06:50-18:13

2 stops16h 23m

£643

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Sun 27/9

08:25-10:25

1 stop21h 00m

London Heathrow

Tue 6/10

14:05-15:40

1 stop30h 35m

£644

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Tue 3/11

22:15-10:50

Nonstop7h 35m

London Heathrow

Thu 12/11

12:05-15:40

Nonstop8h 35m

£652

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Mon 7/12

22:15-10:50

Nonstop7h 35m

London Heathrow

Wed 9/12

16:20-20:15

Nonstop8h 55m

£652

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Tue 6/10

18:35-06:55

Nonstop7h 20m

London Heathrow

Thu 12/11

16:20-20:15

Nonstop8h 55m

£652

Flights are sorted by cheapest return flights first.

Deals found on 29/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

WAS-LHR

BWI-LHR

DCA-LHR

IAD-LHR

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

WAS-LHR

BWI-LHR

DCA-LHR

IAD-LHR

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £506). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £964). 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?

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

The most flights from WAS to LHR are scheduled on a Monday (29 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (24 on average).

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

Airfare is below average for this route at the moment.

Washington, D.C. to London Heathrow Airport flights typically cost between £542 and £805 in November.
The cheapest return price found within the last 5 days was £505 on Icelandair (21 Nov–29 Nov).

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

Dublin (DUB) – chosen by Cheapflights users on 59% 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?

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £493.

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

Flights via New York (JFK) have the shortest average one-way travel time for one-stop routes: 9h 35m.

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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 20m.

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

About 18% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 173 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 Wednesday 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 13% of flights being delayed.

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

Booking 65 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.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Virgin Atlantic,Aer Lingus, andAmerican Airlines 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

7.4

Good

696 reviews

Check prices

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

7.4

Good

696 reviews

Virgin Atlantic

7.4

Good

696 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Aer Lingus

7.3

Good

1,742 reviews

Virgin Atlantic

7.4

Good

696 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

American Airlines

7.1

Good

12,029 reviews

Virgin Atlantic

7.4

Good

696 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Icelandair

6.9

Okay

738 reviews

Virgin Atlantic

7.4

Good

696 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

British Airways

6.7

Okay

8,197 reviews

Virgin Atlantic

7.4

Good

696 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Related info for your journey

How long is the flight from Washington, D.C. to London Heathrow Airport?
Icelandair, Scandinavian Airlines, and United Airlines can get you from Washington, D.C. to London Heathrow Airport in just under 7h 35m. Your travel time can differ by up to 8h 15m. 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 £440, British Airways will fly you from Washington, D.C. to London Heathrow Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Icelandair - these airlines can fly you to your destination from £446 and £487, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 34% 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 £212 on Virgin Atlantic. Other airlines that offer cheap prices include British Airways from £241 and United Airlines from £292 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 SAUDIA (69%), Aer Lingus (68%) or Iberia (68%) 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 £584, our data shows the cheapest flight currently is £225. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £451 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, February is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £506). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £964). 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

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Gatwick

Wembley

Slough

Ilford

Hayes

Croydon

Northampton

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Brentford

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Southall

Southend-on-Sea

Enfield

Kingston upon Thames

Watford

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Alternative routes for Washington, D.C. to Heathrow

Dulles Intl to Heathrow flights

Dulles Intl to Gatwick flights

Reagan-National to Heathrow flights

Dulles Intl to London City flights

Reagan-National to Gatwick flights

Dulles Intl to Luton flights

Reagan-National to Luton flights

Reagan-National to Stansted flights

Top 5 airlines flying from Washington, D.C. to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£391	Average£632	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
British Airways	Cheapest£427	Average£636	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£446	Average£587	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
United Airlines	Cheapest£489	Average£717	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Delta	Cheapest£589	Average£956	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

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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.

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Cheap flights from Washington, D.C. to London Heathrow Airport from £211

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 13/10. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheapest flights from Washington, D.C. to HeathrowExplore 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 2 September 2026.

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 2 September 2026.

Best flights from Washington, D.C. to HeathrowDiscover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 September 2026.

Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 September 2026.

Direct flights from Washington, D.C. to HeathrowExplore direct flight options from Washington, D.C. to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 2 September 2026.

Explore direct flight options from Washington, D.C. to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 2 September 2026.

Last-minute flights from Washington, D.C. to HeathrowDiscover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 2 September 2026 and is based on user searches.

Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 2 September 2026 and is based on user searches.

One-way flights from Washington, D.C. to HeathrowSearch for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated 2 September 2026.

Search for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated 2 September 2026.

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

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

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.

Cheapflights Insights

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

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 2 September 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

The most flights from WAS to LHR are scheduled on a Monday (29 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (24 on average).

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

Airfare is below average for this route at the moment.

Washington, D.C. to London Heathrow Airport flights typically cost between £542 and £805 in November.The cheapest return price found within the last 5 days was £505 on Icelandair (21 Nov–29 Nov).

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 59% 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.

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £493.

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 New York (JFK) have the shortest average one-way travel time for one-stop routes: 9h 35m.

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 Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 20m.

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

About 18% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 173 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 Wednesday 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 13% of flights being delayed.

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

Booking 65 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.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Virgin Atlantic,Aer Lingus, andAmerican Airlines 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.

Related info for your journey

How long is the flight from Washington, D.C. to London Heathrow Airport?

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

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

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

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

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

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

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

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

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

Travelling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington, D.C. to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Washington, D.C. to Heathrow by cabin class

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 2 September 2026.

Best flights from Washington, D.C. to Heathrow
Discover carefully curated flight deals from Washington, D.C. to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 September 2026.

Direct flights from Washington, D.C. to Heathrow
Explore direct flight options from Washington, D.C. to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 2 September 2026.

Last-minute flights from Washington, D.C. to Heathrow
Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 2 September 2026 and is based on user searches.

One-way flights from Washington, D.C. to Heathrow
Search for one-way flight options from Washington, D.C. to Heathrow. Find affordable one-way fares based on user searches. Data last updated 2 September 2026.

Washington, D.C. to London Heathrow Airport flights typically cost between £542 and £805 in November.
The cheapest return price found within the last 5 days was £505 on Icelandair (21 Nov–29 Nov).