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.

£202 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

Mon, 2 Nov - Wed, 18 Nov

17:25 - 21:35IAD Washington, D.C. Dulles Intl-LHR London Heathrow

23h 10m1 stop Lisbon Humberto Delgado

08:15 - 20:35LHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 20m1 stop Lisbon Humberto Delgado

£462TAP AIR PORTUGAL

Thu, 29 Oct - Mon, 9 Nov

18:25 - 11:25IAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 00m1 stop Lisbon Humberto Delgado

18:30 - 14:45LHR London Heathrow-IAD Washington, D.C. Dulles Intl

25h 15m1 stop Lisbon Humberto Delgado

£462TAP AIR PORTUGAL

Sat, 10 Oct - Sun, 25 Oct

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

10h 25m1 stop Reykjavik Keflavik Intl

20:35 - 19:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

£478Icelandair

Sat, 24 Oct - Fri, 30 Oct

20:40 - 11:50IAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 10m1 stop Reykjavik Keflavik Intl

12:15 - 19:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 15m1 stop Reykjavik Keflavik Intl

£480Icelandair

Wed, 9 Dec - Tue, 15 Dec

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

£523British Airways

Sun, 6 Dec - Sun, 13 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

£556British Airways

Mon, 21 Sep - Tue, 29 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

£617Virgin Atlantic

Mon, 21 Sep - Tue, 29 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

£618Virgin Atlantic

Tue, 20 Oct - Fri, 6 Nov

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

7h 35mdirect

10:00 - 15:55LHR London Heathrow-IAD Washington, D.C. Dulles Intl

10h 55m1 stop Amsterdam Schiphol

£631Delta

Wed, 21 Oct - Thu, 5 Nov

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

7h 35mdirect

08:40 - 15:45LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 05m1 stop Amsterdam Schiphol

£631Delta

Recent last minute flight deals from District of Columbia to Heathrow

Tue, 11 Aug - Tue, 1 Sep

22:35 - 18:50IAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 15m1 stop Lisbon Humberto Delgado

19:50 - 15:10LHR London Heathrow-IAD Washington, D.C. Dulles Intl

24h 20m1 stop Lisbon Humberto Delgado

£577TAP AIR PORTUGAL

Mon, 10 Aug - Wed, 2 Sep

17:40 - 12:45IAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 05m1 stop Lisbon Humberto Delgado

06:00 - 15:10LHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 10m1 stop Lisbon Humberto Delgado

£578TAP AIR PORTUGAL

Tue, 11 Aug - Thu, 27 Aug

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

£678Icelandair

Tue, 11 Aug - Mon, 28 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

£702Icelandair

Mon, 10 Aug - Mon, 28 Sep

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

7h 35mdirect

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

8h 15mdirect

£716British Airways

Wed, 12 Aug - Wed, 30 Sep

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

7h 35mdirect

12:35 - 15:55LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 20mdirect

£716British Airways

Wed, 12 Aug - Wed, 19 Aug

19:19 - 10:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 01m1 stop New York John F Kennedy Intl

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

10h 40m1 stop Amsterdam Schiphol

£725Virgin Atlantic

Wed, 12 Aug - Wed, 19 Aug

22:55 - 11:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

19:45 - 16:05LHR London Heathrow-IAD Washington, D.C. Dulles Intl

25h 20m1 stop Paris Charles de Gaulle

£745Virgin Atlantic

Wed, 12 Aug - Fri, 4 Sep

22:55 - 11:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

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

10h 40m1 stop Amsterdam Schiphol

£762Delta

Wed, 12 Aug - Wed, 2 Sep

22:55 - 11:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

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

14h 05m1 stop Amsterdam Schiphol

£762Delta

Recent direct flight deals from District of Columbia to Heathrow

Wed, 9 Dec - Tue, 15 Dec

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

£523British Airways

Sun, 6 Dec - Sun, 13 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

£556British Airways

Tue, 3 Nov - Tue, 10 Nov

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

£568Multiple Airlines

Fri, 6 Nov - Fri, 13 Nov

19:30 - 07:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mdirect

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

8h 30mdirect

£590Multiple Airlines

Mon, 21 Sep - Tue, 29 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

£619Virgin Atlantic

Wed, 7 Oct - 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

£630Virgin Atlantic

Mon, 21 Sep - Tue, 29 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

£652Delta

Mon, 2 Nov - Thu, 12 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

£652Delta

Tue, 22 Sep - Wed, 7 Oct

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

7h 20mdirect

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

8h 15mdirect

£652United Airlines

Mon, 21 Sep - Fri, 9 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

£652United Airlines

Useful Info

Low season	January
High season	December
Cheapest flight	£202

Best time to beat the crowds (22% less expensive on average)

Most popular time to fly (8% 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

Milton Keynes

Eastbourne

Hounslow

Luton

Southend-on-Sea

Northampton

Swindon

Winchester

Slough

Stansted

Croydon

Folkestone

Newport

Poole

Chichester

Colchester

Maidstone

Crawley

Salisbury

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London Heathrow Airport (LHR)

£202 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

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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

Information on your arrival and departure airports

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

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Flights from domestic origins to District of Columbia

Choose which airport to fly into in London

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