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

Scandinavian Airlines, Icelandair, and JetBlue can get you from Washington, D.C. to London Heathrow Airport in just under 10h 10m. Your travel time can differ by up to 21h 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 £430, 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 £451 and £493, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 38% 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 £214 on Virgin Atlantic. Other airlines that offer cheap prices include British Airways from £243 and United Airlines from £295 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 £583, our data shows the cheapest flight currently is £183. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £444 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 Iberia (87%), Aer Lingus (81%) or KLM (78%) 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.

£206+ 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 Tuesday or Sunday 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 26 October 2026.

Mon 30/1109:55 -

3 stops29h 10m

Mon 7/1218:30 -

3 stops30h 53m

Deal found 22/10£503

Sat 5/1220:30 -

2 stops15h 30m

Mon 7/1206:40 -

1 stop15h 35m

Deal found 25/10£504

Sat 28/1117:25 -

1 stop13h 00m

Tue 8/1206:00 -

1 stop13h 40m

Deal found 22/10£504

Wed 2/1222:30 -

1 stop12h 00m

Tue 15/1206:00 -

1 stop13h 40m

Deal found 26/10£508

Wed 9/1211:05 -

3 stops28h 00m

Sat 12/1219:55 -

3 stops31h 04m

Deal found 22/10£509

Wed 9/1209:05 -

3 stops30h 00m

Sat 12/1219:55 -

3 stops29h 28m

Deal found 22/10£509

Wed 2/1211:05 -

3 stops25h 25m

Mon 7/1218:30 -

3 stops32h 29m

Deal found 22/10£518

Wed 18/1119:40 -

1 stop18h 50m

Tue 15/1220:35 -

1 stop26h 55m

Deal found 25/10£519

Wed 2/1211:05 -

3 stops25h 25m

Sat 5/1219:55 -

3 stops31h 04m

Deal found 22/10£520

Tue 10/1117:25 -

1 stop23h 10m

Tue 17/1106:00 -

1 stop13h 40m

Deal found 22/10£520

Tue 17/1117:25 -

1 stop19h 05m

Wed 25/1106:00 -

1 stop19h 30m

Deal found 22/10£522

Fri 13/1122:30 -

1 stop15h 25m

Thu 26/1106:00 -

1 stop14h 15m

Deal found 22/10£522

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 26 October 2026.

Mon 30/1120:30 -

2 stops31h 25m

Thu 3/1207:05 -

2 stops15h 10m

Deal found 23/10£566

Sat 14/1119:40 -

1 stop10h 10m

Wed 18/1112:15 -

1 stop11h 15m

Deal found 25/10£599

Tue 1/1213:00 -

1 stop12h 55m

Mon 7/1209:20 -

1 stop12h 30m

Deal found 24/10£623

Tue 1/1218:55 -

Nonstop7h 25m

Thu 10/1208:40 -

1 stop12h 05m

Deal found 23/10£653

Tue 29/1218:12 -

1 stop10h 43m

Tue 12/108:40 -

2 stops15h 40m

Deal found 23/10£665

Tue 6/419:15 -

Nonstop7h 30m

Wed 5/512:15 -

1 stop12h 10m

Deal found 22/10£679

Fri 11/1222:15 -

Nonstop7h 35m

Wed 16/1212:05 -

1 stop33h 55m

Deal found 25/10£693

Fri 27/1119:30 -

Nonstop7h 25m

Fri 4/1206:30 -

1 stop14h 25m

Deal found 22/10£698

Wed 13/116:15 -

2 stops13h 35m

Mon 18/120:35 -

1 stop27h 05m

Deal found 22/10£758

Fri 9/420:20 -

2 stops17h 10m

Sat 17/415:35 -

2 stops30h 15m

Deal found 22/10£584

Thu 4/319:40 -

1 stop18h 50m

Sun 14/320:35 -

1 stop27h 05m

Deal found 25/10£619

Sat 7/1115:54 -

1 stop10h 01m

Fri 13/1112:20 -

1 stop14h 55m

Deal found 23/10£623

Fri 6/1119:40 -

1 stop18h 50m

Mon 9/1120:35 -

1 stop27h 05m

Deal found 21/10£619

Sat 28/1106:00 -

1 stop10h 40m

Thu 3/1209:20 -

1 stop11h 31m

Deal found 25/10£623

Tue 1/1218:20 -

Nonstop7h 20m

Sun 6/1209:00 -

1 stop13h 00m

Deal found 21/10£693

Sun 7/318:55 -

Nonstop7h 25m

Sat 13/313:05 -

Nonstop8h 40m

Deal found 25/10£705

Fri 22/112:00 -

2 stops23h 00m

Thu 28/119:30 -

2 stops32h 34m

Deal found 25/10£658

Thu 3/1212:00 -

2 stops13h 50m

Sun 6/1214:05 -

2 stops16h 02m

Deal found 23/10£742

Wed 11/1112:00 -

1 stop13h 55m

Fri 13/1109:20 -

1 stop11h 35m

Deal found 25/10£624

Wed 11/1118:20 -

Nonstop7h 20m

Wed 18/1109:00 -

1 stop13h 00m

Deal found 21/10£693

Sat 7/1118:55 -

Nonstop7h 10m

Tue 17/1109:55 -

1 stop12h 05m

Deal found 25/10£772

Mon 9/1120:30 -

1 stop17h 00m

Sat 14/1117:00 -

2 stops47h 52m

Deal found 22/10£664

Fri 25/1214:00 -

1 stop11h 25m

Tue 29/1209:40 -

1 stop12h 51m

Deal found 25/10£830

Mon 18/111:40 -

1 stop14h 15m

Mon 1/209:20 -

1 stop11h 38m

Deal found 21/10£626

Fri 23/412:15 -

2 stops13h 55m

Fri 30/411:30 -

2 stops16h 25m

Deal found 25/10£812

Thu 4/306:00 -

1 stop10h 40m

Fri 12/309:20 -

1 stop13h 37m

Deal found 25/10£627

Thu 26/1113:19 -

1 stop12h 51m

Tue 1/1212:05 -

Nonstop8h 35m

Deal found 25/10£769

Thu 1/406:05 -

2 stops22h 30m

Sun 4/418:40 -

2 stops33h 50m

Deal found 22/10£702

Mon 14/1219:40 -

1 stop18h 50m

Sat 19/1220:35 -

1 stop27h 05m

Deal found 23/10£783

Mon 8/306:00 -

1 stop10h 40m

Sat 13/309:20 -

1 stop13h 37m

Deal found 25/10£627

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

Round-trip from	£500
One-way from	£206
Popular in	June
Cheapest in	February
Average price	£652
Good round-trip deal	£643 or less
Good one-way deal	£349 or less

Iberia
14/1-21/1
2 total stops
28h 20m total
Washington, D.C. to London

Search Deals

11/1-31/12
2 total stops
36h 51m total
Washington, D.C. to London

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£112 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 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

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Mon 15/3

19:55-07:20

Nonstop7h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£243

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Sun 4/4

19:15-07:45

Nonstop7h 30m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£247

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Wed 31/3

22:25-10:50

Nonstop7h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£247

Washington, D.C.London

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

DCALHR

Washington, D.C. Reagan-National

Thu 31/12

06:17-21:40

1 stop10h 23m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£278

Washington, D.C.London

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

DCALHR

Washington, D.C. Reagan-National

Thu 8/4

17:30-08:30

1 stop10h 00m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£283

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Fri 19/3

08:15-07:10

2 stops18h 55m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£290

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Sat 5/12

17:25-22:40

1 stop24h 15m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£345

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Fri 4/12

22:30-21:35

1 stop18h 05m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£345

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Sun 10/1

18:55-07:20

Nonstop7h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£365

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Tue 29/12

21:45-10:00

Nonstop7h 15m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£365

Flights are sorted by cheapest return flights first.

Deals found on 26/10

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

IAD-LHR

DCA-LHR

BWI-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

IAD-LHR

DCA-LHR

BWI-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 £522). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £976). 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 Sunday (27 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 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 £540 and £784 in January.
The cheapest return price found within the last 5 days was £500 on Iberia (14 Jan–21 Jan).

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

Dublin (DUB) – chosen by Cheapflights users on 63% 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?

New York (JFK) is the most affordable one-stop option, with an average return flight price of £557.

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 00m.

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

Flights via New York (JFK) offer the fastest connection on this route, with an average stopover time of 1h 15m.

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 174 minutes.

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

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 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 Aer Lingus,United Airlines, 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.

Aer Lingus

7.3

Good

1,858 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

DUB - EDI

Fine except for app. Couldn’t check in online - kept saying I couldn’t check in until the morning after my flight. On second leg I could check in but couldn’t get my boarding pass into my wallet. Thankfully I took a screenshot of it because I couldn’t retrieve it when we boarded - the app prohibited it.

Aer Lingus

7.3

Good

1,858 reviews

Aer Lingus

7.3

Good

1,858 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

DUB - EDI

United Airlines

7.3

Good

10,440 reviews

Aer Lingus

7.3

Good

1,858 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

DUB - EDI

American Airlines

7.0

Good

12,187 reviews

Aer Lingus

7.3

Good

1,858 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

DUB - EDI

Icelandair

7.0

Good

766 reviews

Aer Lingus

7.3

Good

1,858 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

DUB - EDI

British Airways

6.7

Okay

8,270 reviews

Aer Lingus

7.3

Good

1,858 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

DUB - EDI

Related info for your journey

How long is the flight from Washington, D.C. to London Heathrow Airport?
Scandinavian Airlines, Icelandair, and JetBlue can get you from Washington, D.C. to London Heathrow Airport in just under 10h 10m. Your travel time can differ by up to 21h 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 £430, 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 £451 and £493, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 38% 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 £214 on Virgin Atlantic. Other airlines that offer cheap prices include British Airways from £243 and United Airlines from £295 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 Iberia (87%), Aer Lingus (81%) or KLM (78%) 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 £583, our data shows the cheapest flight currently is £183. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £444 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 £522). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £976). 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

Hounslow

Luton

Milton Keynes

Slough

Wembley

Gatwick

Ilford

Hayes

Croydon

Northampton

Barnet

Eastbourne

Brentford

Southend-on-Sea

Southall

Enfield

Watford

Kingston upon Thames

Dagenham

Dover

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

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Heathrow flight routes

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Other flights from Washington, D.C.

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Top destinations

Alternative routes for Washington, D.C. to Heathrow

Dulles Intl to Heathrow flights

Reagan-National to Heathrow flights

Dulles Intl to Gatwick 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£233	Average£639	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
British Airways	Cheapest£430	Average£703	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£451	Average£593	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
United Airlines	Cheapest£495	Average£771	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Delta	Cheapest£596	Average£966	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

Fly with Cheapflights

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 £206

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/1. 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 26 October 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 26 October 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 26 October 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 26 October 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 26 October 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 26 October 2026.

Last-minute flights from Washington, D.C. to HeathrowDiscover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 26 October 2026 and is based on user searches.

Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 26 October 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 26 October 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 26 October 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 26 October 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 Sunday (27 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 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 £540 and £784 in January.The cheapest return price found within the last 5 days was £500 on Iberia (14 Jan–21 Jan).

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 63% 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.

New York (JFK) is the most affordable one-stop option, with an average return flight price of £557.

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 00m.

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 New York (JFK) offer the fastest connection on this route, with an average stopover time of 1h 15m.

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 174 minutes.

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

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 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 Aer Lingus,United Airlines, 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 26 October 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 26 October 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 26 October 2026.

Last-minute flights from Washington, D.C. to Heathrow
Discover last-minute flight deals from Washington, D.C. to Heathrow. Data last updated 26 October 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 26 October 2026.

Washington, D.C. to London Heathrow Airport flights typically cost between £540 and £784 in January.
The cheapest return price found within the last 5 days was £500 on Iberia (14 Jan–21 Jan).