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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

£197 CHEAP FLIGHTS from District of Columbia to London Heathrow (LHR)

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Flight Deals

Cheap Flights from District of Columbia to Heathrow

Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from District of Columbia to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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

Round-trip

One-way

Last minute

Direct

Recent return flight deals from District of Columbia to Heathrow

Mon, 26 Jan - Mon, 2 Feb

12:30 - 09:20IAD-LHR

15h 50m2 stops

10:20 - 17:15LHR-IAD

11h 55m1 stop

£363Scandinavian Airlines

Find Deal

Wed, 1 Oct - Wed, 8 Oct

20:30 - 20:20IAD-LHR

18h 50m1 stop

21:25 - 19:20LHR-IAD

26h 55m1 stop

£363Icelandair

Find Deal

Thu, 26 Feb - Wed, 11 Mar

19:40 - 19:30IAD-LHR

18h 50m1 stop

20:35 - 19:30LHR-IAD

26h 55m1 stop

£364Icelandair

Find Deal

Thu, 11 Dec - Tue, 16 Dec

17:30 - 17:30IAD-LHR

19h 00m1 stop

18:30 - 21:00LHR-IAD

31h 30m1 stop

£383TAP AIR PORTUGAL

Find Deal

Wed, 29 Oct - Wed, 5 Nov

09:40 - 07:10DCA-LHR

17h 30m2 stops

09:00 - 21:56LHR-DCA

17h 56m2 stops

£396Air Canada

Find Deal

Wed, 29 Oct - Wed, 5 Nov

19:20 - 06:40IAD-LHR

7h 20mdirect

06:50 - 14:35LHR-IAD

12h 45m1 stop

£396Lufthansa

Find Deal

Wed, 10 Dec - Tue, 16 Dec

22:30 - 17:30IAD-LHR

14h 00m1 stop

18:30 - 21:00LHR-IAD

31h 30m1 stop

£400TAP AIR PORTUGAL

Find Deal

Wed, 29 Oct - Wed, 5 Nov

16:40 - 07:10DCA-LHR

10h 30m1 stop

06:50 - 15:31LHR-DCA

13h 41m2 stops

£403Air Canada

Find Deal

Wed, 8 Oct - Mon, 13 Oct

09:35 - 06:30IAD-LHR

15h 55m1 stop

20:05 - 16:15LHR-IAD

25h 10m1 stop

£407

Find Deal

Tue, 14 Oct - Tue, 21 Oct

06:00 - 08:35DCA-LHR

21h 35m2 stops

06:50 - 15:51LHR-DCA

14h 01m2 stops

£408

Find Deal

Cheapest return fare

£363

Overall average: £520

Scandinavian Airlines

Mon 26/1Mon 2/2

IAD - LHR • 2 stops

Cheapest direct flights

£403

Typical prices: £464-659

Lufthansa

Wed 29/10Wed 5/11

IAD - LHR • Direct

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KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to Heathrow!

Useful Info

Low season	February
High season	July
Cheapest flight	£197

Best time to beat the crowds (7% less expensive on average)

Most popular time to fly (11% more expensive on average)

Flight from Washington Dulles Airport to London Heathrow Airport

DeeFlew with United AirlinesIAD-LHRFeb 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 AirwaysIAD-LHROct 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 AirlinesIAD-LHRJun 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

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Eastbourne

Luton

Hounslow

Southend-on-Sea

Swindon

Northampton

Slough

Winchester

Croydon

Stansted

Poole

Folkestone

Chichester

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Colchester

Salisbury

Chelmsford

Crawley

Everything you need to know for your flight to Heathrow

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London Heathrow Airport (LHR)

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£197 Find Cheap Flights from District of Columbia to London Heathrow Airport

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

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

Everything you should know

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

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

FAQs for booking District of Columbia to London Heathrow Airport flights

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?

Travelling to a place near Heathrow?

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

Cabin class types available on flights to Heathrow

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

Find direct flights for Heathrow

Flights to other popular destinations

Flights from domestic origins to District of Columbia

Choose which airport to fly into in London

Find deals for your return flight