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.

£237 CHEAP FLIGHTS from District of Columbia to London Heathrow (LHR)

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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

Sat, 14 Nov - Mon, 7 Dec

17:25 - 15:30IAD Washington, D.C. Dulles Intl-LHR London Heathrow

17h 05m1 stop Lisbon Humberto Delgado

06:00 - 15:15LHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 15m1 stop Lisbon Humberto Delgado

£461TAP AIR PORTUGAL

Mon, 21 Sep - Wed, 7 Oct

17:40 - 10:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

11h 40m1 stop Lisbon Humberto Delgado

08:00 - 20:35LHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 35m1 stop Lisbon Humberto Delgado

£461TAP AIR PORTUGAL

Fri, 12 Feb - Sun, 21 Feb

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

18h 50m1 stop Reykjavik Keflavik Intl

20:35 - 18:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

£476Icelandair

Thu, 11 Feb - Mon, 22 Feb

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

18h 50m1 stop Reykjavik Keflavik Intl

12:15 - 18:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 15m1 stop Reykjavik Keflavik Intl

£485Icelandair

Tue, 24 Nov - Thu, 26 Nov

22:15 - 10:50IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

06:50 - 14:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 40m1 stop Brussels Bruxelles-National

£533United Airlines

Tue, 24 Nov - Thu, 26 Nov

13:19 - 07:10IAD Washington, D.C. Dulles Intl-LHR London Heathrow

12h 51m1 stop Montreal Pierre Elliott Trudeau Intl

06:50 - 14:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 40m1 stop Brussels Bruxelles-National

£535United Airlines

Wed, 25 Nov - Mon, 30 Nov

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

7h 10mdirect

07:30 - 16:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 50m1 stop Madrid Barajas

£585British Airways

Sun, 31 Jan - Sun, 14 Feb

21:45 - 10:00IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 15mdirect

17:25 - 16:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

27h 55m1 stop Madrid Barajas

£589British Airways

Mon, 28 Sep - Wed, 14 Oct

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

7h 35mdirect

20:55 - 15:35LHR London Heathrow-IAD Washington, D.C. Dulles Intl

23h 40m1 stop Amsterdam Schiphol

£597Virgin Atlantic

Wed, 30 Sep - Sun, 4 Oct

12:25 - 06:45IAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 20m1 stop New York John F Kennedy Intl

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

8h 25mdirect

£606Virgin Atlantic

Recent last minute flight deals from District of Columbia to Heathrow

Tue, 1 Sep - Mon, 21 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

£641Icelandair

Mon, 31 Aug - Fri, 4 Sep

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

14h 40m1 stop Kastrup Copenhagen

10:20 - 17:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 40m1 stop Kastrup Copenhagen

£653Scandinavian Airlines

Mon, 31 Aug - Thu, 3 Sep

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

14h 40m1 stop Kastrup Copenhagen

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

15h 20m1 stop Kastrup Copenhagen

£653Scandinavian Airlines

Tue, 1 Sep - Wed, 9 Sep

23:20 - 20:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

16h 00m1 stop Reykjavik Keflavik Intl

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

26h 55m1 stop Reykjavik Keflavik Intl

£661Icelandair

Tue, 1 Sep - Tue, 22 Sep

17:45 - 06:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mdirect

06:15 - 18:50LHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 35m1 stop Madrid Barajas

£759British Airways

Tue, 1 Sep - Wed, 9 Sep

22:15 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

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

11h 40m1 stop Brussels Bruxelles-National

£759United Airlines

Tue, 1 Sep - Fri, 11 Sep

22:15 - 10:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

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

11h 40m1 stop Brussels Bruxelles-National

£759United Airlines

Tue, 1 Sep - Thu, 15 Oct

18:00 - 13:05IAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 05m1 stop Minneapolis St Paul

09:55 - 15:35LHR London Heathrow-IAD Washington, D.C. Dulles Intl

10h 40m1 stop Amsterdam Schiphol

£763Delta

Wed, 2 Sep - Wed, 9 Sep

18:15 - 13:45IAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 30m1 stop Paris Charles de Gaulle

09:55 - 15:35LHR London Heathrow-IAD Washington, D.C. Dulles Intl

10h 40m1 stop Amsterdam Schiphol

£764Delta

Tue, 1 Sep - Tue, 22 Sep

22:25 - 10:50IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

17:05 - 20:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 15mdirect

£768British Airways

Recent direct flight deals from District of Columbia to Heathrow

Wed, 27 Jan - Sun, 31 Jan

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

7h 25mdirect

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

8h 30mdirect

£559Multiple Airlines

Wed, 2 Dec - Sun, 6 Dec

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

7h 25mdirect

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

8h 25mdirect

£567Multiple Airlines

Wed, 27 Jan - Sun, 31 Jan

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

£590British Airways

Tue, 1 Dec - Mon, 7 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

£595British Airways

Mon, 28 Sep - Wed, 7 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

£618Virgin Atlantic

Mon, 28 Sep - Wed, 14 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

£618Virgin Atlantic

Wed, 14 Oct - Wed, 21 Oct

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

7h 20mdirect

16:40 - 20:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mdirect

£649United Airlines

Tue, 29 Sep - Tue, 3 Nov

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

7h 20mdirect

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

8h 55mdirect

£649United Airlines

Tue, 6 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

£651Delta

Sun, 27 Sep - Thu, 22 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

£651Delta

Useful Info

Low season	January
High season	July
Cheapest flight	£237

Best time to beat the crowds (25% less expensive on average)

Most popular time to fly (21% 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

Swindon

Winchester

Slough

Folkestone

Newport

Stansted

Croydon

Poole

Colchester

Chichester

Crawley

Maidstone

Salisbury

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London Heathrow Airport (LHR)

£237 Find Cheap Flights from District of Columbia to London Heathrow Airport – Compare and Save

Cheap Flights from District of Columbia to Heathrow

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Recent last minute flight deals from District of Columbia to Heathrow

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

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

FAQs for booking District of Columbia to London Heathrow Airport flights

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Everything you need to know for your flight to Heathrow

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