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.

£239 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

Wed, 14 Oct - Thu, 10 Dec

20:20 - 17:50IAD Washington, D.C. Dulles Intl-LHR London Heathrow

16h 30m1 stop Zurich

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

16h 00m1 stop Zurich

£511SWISS

Tue, 20 Oct - Wed, 9 Dec

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

15h 05m1 stop Zurich

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

16h 00m1 stop Zurich

£511SWISS

Mon, 12 Oct - Wed, 21 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, 13 Oct - Thu, 22 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, 29 Sep - Tue, 3 Nov

21:05 - 12:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 35m1 stop Dublin

12:10 - 19:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 10m1 stop Dublin

£522British Airways

Wed, 21 Oct - Wed, 4 Nov

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

7h 25mdirect

07:35 - 16:20LHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 45m1 stop Madrid Barajas

£523British Airways

Tue, 20 Oct - Tue, 27 Oct

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

7h 35mdirect

13:20 - 18:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mdirect

£527Virgin Atlantic

Sun, 11 Oct - Tue, 20 Oct

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

£527Virgin Atlantic

Tue, 29 Sep - Wed, 28 Oct

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

7h 20mdirect

09:00 - 18:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 00m1 stop Zurich

£530United Airlines

Wed, 9 Dec - Fri, 25 Dec

18:20 - 06:40IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 20mdirect

09:00 - 17:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 00m1 stop Zurich

£530United Airlines

Recent last minute flight deals from District of Columbia to Heathrow

Mon, 21 Sep - Thu, 8 Oct

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

7h 35mdirect

10:50 - 18:50LHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 00m1 stop Madrid Barajas

£526British Airways

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

£526Virgin Atlantic

Mon, 21 Sep - Tue, 29 Sep

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

7h 35mdirect

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

10h 40m1 stop Amsterdam Schiphol

£527Virgin Atlantic

Wed, 23 Sep - Wed, 30 Sep

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

7h 35mdirect

07:50 - 15:30LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 40m1 stop Madrid Barajas

£528American Airlines

Wed, 23 Sep - Wed, 30 Sep

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

7h 20mdirect

12:10 - 16:45LHR London Heathrow-IAD Washington, D.C. Dulles Intl

33h 35m1 stop Zurich

£532United Airlines

Wed, 23 Sep - Thu, 1 Oct

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

£532United Airlines

Wed, 23 Sep - Mon, 28 Sep

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

19h 20m1 stop Ottawa

17:15 - 16:45LHR London Heathrow-IAD Washington, D.C. Dulles Intl

28h 30m1 stop Zurich

£533Multiple Airlines

Tue, 22 Sep - Tue, 29 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

£539British Airways

Mon, 21 Sep - Tue, 29 Sep

15:15 - 11:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 05m1 stop Atlanta Hartsfield-Jackson

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

11h 55m1 stop Amsterdam Schiphol

£541Delta

Wed, 23 Sep - Wed, 30 Sep

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

7h 35mdirect

06:15 - 16:05LHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 50m1 stop Paris Charles de Gaulle

£541Delta

Recent direct flight deals from District of Columbia to Heathrow

Wed, 6 Jan - Wed, 13 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

£520Iberia

Mon, 16 Nov - Wed, 25 Nov

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

7h 15mdirect

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

8h 30mdirect

£524Finnair

Tue, 6 Oct - Thu, 15 Oct

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

£526British Airways

Tue, 20 Oct - Tue, 27 Oct

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

7h 35mdirect

13:20 - 18:00LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mdirect

£527Virgin Atlantic

Sun, 11 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

£534Virgin Atlantic

Tue, 3 Nov - Tue, 10 Nov

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

7h 15mdirect

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

8h 25mdirect

£535British Airways

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

£543United Airlines

Mon, 12 Oct - Tue, 10 Nov

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

7h 20mdirect

12:05 - 15:40LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 35mdirect

£545United Airlines

Mon, 12 Oct - Fri, 6 Nov

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

7h 35mdirect

14:00 - 17:40LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mdirect

£545Delta

Sun, 11 Oct - Tue, 10 Nov

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

7h 35mdirect

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

8h 40mdirect

£545Delta

Useful Info

Low season	January
High season	July
Cheapest flight	£239

Best time to beat the crowds (26% less expensive on average)

Most popular time to fly (20% more expensive on average)

Flight from Reagan Washington National 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

Folkestone

Newport

Winchester

Swindon

Poole

Croydon

Slough

Stansted

Colchester

Chichester

Crawley

Maidstone

Salisbury

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£239 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

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