How does KAYAK find such low prices on flights from District of Columbia to London Heathrow Airport?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from District of Columbia to London Heathrow Airport.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from District of Columbia to London Heathrow Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from District of Columbia is likely to change within 7 days, so travellers know whether to wait or book now.

What is the Hacker Fare option on flights from District of Columbia to London Heathrow Airport?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to District of Columbia with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from District of Columbia to London Heathrow Airport?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

£242 CHEAP FLIGHTS from District of Columbia to London Heathrow (LHR)

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Flight Deals

Cheap Flights from District of Columbia to Heathrow

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Last minute

Direct

Recent return flight deals from District of Columbia to Heathrow

Tue, 29 Sep - Thu, 15 Oct

20:30 - 11:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 25m1 stop Reykjavik Keflavik Intl

21:25 - 19:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

£519Icelandair

Tue, 22 Sep - Thu, 1 Oct

20:30 - 11:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 25m1 stop Reykjavik Keflavik Intl

21:25 - 19:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

£519Icelandair

Mon, 19 Oct - Mon, 26 Oct

20:30 - 21:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

20h 10m3 stops Reykjavik Keflavik Intl Oslo Gardermoen Kastrup Copenhagen

07:05 - 19:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

16h 25m2 stops Oslo Gardermoen Reykjavik Keflavik Intl

£519Multiple Airlines

Sat, 17 Oct - Mon, 26 Oct

20:30 - 21:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

19h 50m2 stops Reykjavik Keflavik Intl Stockholm Arlanda

06:40 - 19:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

16h 50m2 stops Stockholm Arlanda Reykjavik Keflavik Intl

£520Multiple Airlines

Mon, 7 Dec - Tue, 8 Dec

06:00 - 21:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 20m1 stop Newark

11:05 - 14:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

32h 25m1 stop Brussels Bruxelles-National

£538United Airlines

Sat, 5 Dec - Mon, 7 Dec

22:10 - 21:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 10m1 stop Newark

11:05 - 14:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

32h 25m1 stop Brussels Bruxelles-National

£538United Airlines

Tue, 26 Jan - Thu, 4 Feb

18:05 - 06:15IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mdirect

12:15 - 15:40LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mdirect

£553British Airways

Wed, 9 Dec - Mon, 14 Dec

18:05 - 06:15IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mdirect

16:25 - 19:55LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mdirect

£594British Airways

Sat, 7 Nov - Thu, 19 Nov

18:55 - 07:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

13:20 - 17:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mdirect

£609Virgin Atlantic

Sun, 4 Oct - Tue, 20 Oct

22:05 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

08:40 - 15:35LHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 55m1 stop Amsterdam Schiphol

£615Virgin Atlantic

Recent last minute flight deals from District of Columbia to Heathrow

Thu, 10 Sep - Thu, 17 Sep

20:20 - 21:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

20h 20m1 stop Kastrup Copenhagen

06:40 - 17:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 20m1 stop Kastrup Copenhagen

£570Scandinavian Airlines

Fri, 11 Sep - Sat, 19 Sep

20:20 - 16:00IAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 40m1 stop Kastrup Copenhagen

13:55 - 17:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

32h 05m2 stops Stockholm Arlanda Kastrup Copenhagen

£575Scandinavian Airlines

Tue, 8 Sep - Fri, 18 Sep

20:30 - 11:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 25m1 stop Reykjavik Keflavik Intl

21:25 - 19:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

£703Icelandair

Fri, 11 Sep - Tue, 15 Sep

20:30 - 20:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 50m1 stop Reykjavik Keflavik Intl

21:25 - 19:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

£712Icelandair

Wed, 9 Sep - Wed, 16 Sep

22:05 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

08:55 - 16:05LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 10m1 stop Paris Charles de Gaulle

£752Virgin Atlantic

Tue, 8 Sep - Thu, 17 Sep

22:05 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

08:40 - 15:35LHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 55m1 stop Amsterdam Schiphol

£761Delta

Mon, 7 Sep - Thu, 17 Sep

22:05 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

06:30 - 15:35LHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 05m1 stop Amsterdam Schiphol

£761Delta

Tue, 8 Sep - Wed, 16 Sep

18:35 - 06:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 20mdirect

06:50 - 13:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 40m1 stop Brussels Bruxelles-National

£761United Airlines

Wed, 9 Sep - Thu, 17 Sep

18:35 - 06:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 20mdirect

08:45 - 16:45LHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 00m1 stop Zurich

£761United Airlines

Wed, 9 Sep - Wed, 16 Sep

22:05 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

15:50 - 19:15LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mdirect

£771Virgin Atlantic

Recent direct flight deals from District of Columbia to Heathrow

Tue, 26 Jan - Thu, 4 Feb

18:05 - 06:15IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mdirect

12:15 - 15:40LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mdirect

£553British Airways

Wed, 9 Dec - Mon, 14 Dec

18:05 - 06:15IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mdirect

16:25 - 19:55LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mdirect

£594British Airways

Sun, 6 Dec - Fri, 11 Dec

18:05 - 06:15IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mdirect

16:25 - 19:55LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mdirect

£595Iberia

Wed, 9 Dec - Mon, 14 Dec

21:55 - 10:10IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 15mdirect

16:25 - 19:55LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mdirect

£595Iberia

Sat, 7 Nov - Thu, 19 Nov

18:55 - 07:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

13:20 - 17:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mdirect

£609Virgin Atlantic

Sun, 4 Oct - Tue, 13 Oct

22:05 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

15:50 - 19:15LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mdirect

£633Virgin Atlantic

Sun, 4 Oct - Tue, 13 Oct

22:05 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

15:50 - 19:15LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mdirect

£652Delta

Wed, 14 Oct - Tue, 20 Oct

22:05 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

15:50 - 19:15LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mdirect

£652Delta

Tue, 20 Oct - Tue, 27 Oct

18:35 - 06:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 20mdirect

16:20 - 21:15LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 55mdirect

£652United Airlines

Wed, 14 Oct - Wed, 28 Oct

18:35 - 06:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 20mdirect

16:20 - 21:15LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 55mdirect

£652United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	£242

Best time to beat the crowds (27% less expensive on average)

Most popular time to fly (18% more expensive on average)

Flight from Washington Dulles Airport to London Heathrow Airport

DeeFlew with United Airlines-Feb 2025

For me the best route to LHR is the late night departure on UAL. The flight is often roughly 6.5 hours so I skip dinner, use an eye mask and earplugs and try to sleep.

EllenFlew with British Airways-Oct 2024

Do not check your bag if at all possible, especially if you have a connecting flight. Your bag will not make it.

CraigFlew with United Airlines-Jun 2024

Get to beginning of boarding group early. Bring as little on board as possible due to small overhead bin space.

How does KAYAK find such low prices on flights from District of Columbia to London Heathrow Airport?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from District of Columbia to London Heathrow Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from District of Columbia to London Heathrow Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from District of Columbia is likely to change within 7 days, so travellers know whether to wait or book now.
What is the Hacker Fare option on flights from District of Columbia to London Heathrow Airport?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to District of Columbia with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from District of Columbia to London Heathrow Airport?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Gatwick

Eastbourne

Milton Keynes

Hounslow

Luton

Southend-on-Sea

Northampton

Newport

Folkestone

Winchester

Swindon

Slough

Croydon

Stansted

Poole

Colchester

Chichester

Crawley

Maidstone

Salisbury

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£242 Find Cheap Flights from District of Columbia to London Heathrow Airport – Compare and Save

Cheap Flights from District of Columbia to Heathrow

Recent return flight deals from District of Columbia to Heathrow

Recent one-way flight deals from District of Columbia to Heathrow

Recent last minute flight deals from District of Columbia to Heathrow

Recent direct flight deals from District of Columbia to Heathrow

Good to know - Cheap tickets from District of Columbia to London Heathrow Airport

Low season

High season

Cheapest flight

Flights from District of Columbia to Heathrow: the best tips from KAYAK users

FAQs for booking District of Columbia to London Heathrow Airport flights

Travelling to a place near Heathrow?

More options for your flight to Heathrow

Complete your trip to Heathrow with a hotel stay or car hire

Information on your arrival and departure airports

Cabin class types available on flights to Heathrow

Find direct flights for Heathrow

Flights from domestic origins to District of Columbia

Choose which airport to fly into in London

Flights to other popular destinations

Find deals for your return flight