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.

£241 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

Thu, 8 Oct - Mon, 12 Oct

15:45 - 10:00IAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 15m1 stop Montreal Pierre Elliott Trudeau Intl

08:30 - 15:25LHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 55m1 stop Toronto Pearson Intl

£505Air Canada

Thu, 15 Oct - Mon, 19 Oct

20:20 - 08:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

55h 35m2 stops Kastrup Copenhagen Stockholm Arlanda

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

15h 20m1 stop Kastrup Copenhagen

£505Scandinavian Airlines

Wed, 9 Dec - Wed, 16 Dec

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

7h 10mdirect

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

13h 45m1 stop Madrid Barajas

£506British Airways

Tue, 8 Dec - Tue, 15 Dec

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

7h 15mdirect

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

13h 50m1 stop Madrid Barajas

£507British Airways

Tue, 29 Sep - Wed, 28 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

£511Icelandair

Mon, 26 Oct - Sat, 31 Oct

20:40 - 10:50IAD 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

£511Icelandair

Fri, 6 Nov - Fri, 20 Nov

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

7h 25mdirect

08:40 - 15:55LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 15m1 stop Amsterdam Schiphol

£523Virgin Atlantic

Sat, 7 Nov - Thu, 19 Nov

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

7h 25mdirect

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

12h 05m1 stop Amsterdam Schiphol

£523Virgin Atlantic

Wed, 4 Nov - Fri, 20 Nov

12:30 - 06:20IAD Washington, D.C. Dulles Intl-LHR London Heathrow

12h 50m1 stop New York John F Kennedy Intl

08:40 - 15:55LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 15m1 stop Amsterdam Schiphol

£535Delta

Sun, 8 Nov - Fri, 20 Nov

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

7h 25mdirect

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

10h 55m1 stop Amsterdam Schiphol

£535Delta

Recent last minute flight deals from District of Columbia to Heathrow

Tue, 15 Sep - Tue, 22 Sep

21:30 - 09:50IAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 20mdirect

11:30 - 18:50LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 20m1 stop Madrid Barajas

£519British Airways

Tue, 15 Sep - Wed, 7 Oct

20:25 - 13:35IAD Washington, D.C. Dulles Intl-LHR London Heathrow

12h 10m1 stop Madrid Barajas

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

12h 40m1 stop Madrid Barajas

£522Iberia

Tue, 15 Sep - Tue, 22 Sep

20:25 - 18:55IAD Washington, D.C. Dulles Intl-LHR London Heathrow

17h 30m1 stop Madrid Barajas

11:30 - 18:50LHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 20m1 stop Madrid Barajas

£522Iberia

Tue, 15 Sep - Tue, 22 Sep

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

7h 25mdirect

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

8h 20mdirect

£534British Airways

Tue, 15 Sep - Sat, 23 Jan

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

10h 25m1 stop Reykjavik Keflavik Intl

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

11h 15m1 stop Reykjavik Keflavik Intl

£629Icelandair

Tue, 15 Sep - Fri, 22 Jan

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

10h 25m1 stop Reykjavik Keflavik Intl

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

11h 15m1 stop Reykjavik Keflavik Intl

£630Icelandair

Mon, 14 Sep - Mon, 21 Sep

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

£750Virgin Atlantic

Mon, 14 Sep - Tue, 22 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

£760Delta

Mon, 14 Sep - Fri, 25 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

£760Delta

Fri, 11 Sep - Fri, 18 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

£784Virgin Atlantic

Recent direct flight deals from District of Columbia to Heathrow

Mon, 9 Nov - Tue, 24 Nov

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

£524Finnair

Tue, 8 Dec - Tue, 15 Dec

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

£524Finnair

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

£527Virgin Atlantic

Fri, 6 Nov - Fri, 20 Nov

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

7h 25mdirect

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

8h 40mdirect

£527Virgin Atlantic

Wed, 6 Jan - Wed, 13 Jan

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

£530British Airways

Tue, 6 Oct - Thu, 15 Oct

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

7h 25mdirect

14:00 - 17:25LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mdirect

£534British Airways

Tue, 10 Nov - Tue, 24 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

£540Delta

Tue, 10 Nov - Wed, 25 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

£540Delta

Sun, 18 Oct - Tue, 27 Oct

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

7h 35mdirect

12:05 - 16:40LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 35mdirect

£651United Airlines

Tue, 13 Oct - Wed, 28 Oct

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

7h 35mdirect

12:05 - 16:40LHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 35mdirect

£651United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	£241

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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£241 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