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 travelers 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 round-trip 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>

$289 CHEAP FLIGHTS from District of Columbia to London Heathrow (LHR)

LHR

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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 round-trip 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 round-trip flight deals from District of Columbia to Heathrow

vie., oct. 3 - lun., oct. 6

10:05 pm - 8:55 amIAD-LHR

29h 50m2 stops

7:05 am - 7:59 pmLHR-IAD

17h 54m2 stops

$491Scandinavian Airlines

Find Deal

mar., oct. 7 - mié., oct. 15

8:30 pm - 11:55 amIAD-LHR

10h 25m1 stop

1:05 pm - 10:10 pmLHR-IAD

14h 05m1 stop

$493Icelandair

Find Deal

mié., sep. 24 - jue., oct. 9

10:20 pm - 6:50 pmIAD-LHR

15h 30m1 stop

8:00 am - 8:50 pmLHR-IAD

17h 50m1 stop

$554TAP AIR PORTUGAL

Find Deal

mié., sep. 24 - jue., oct. 9

10:20 pm - 10:00 pmIAD-LHR

18h 40m1 stop

8:00 am - 8:50 pmLHR-IAD

17h 50m1 stop

$556TAP AIR PORTUGAL

Find Deal

mar., oct. 7 - mié., oct. 15

6:00 am - 8:40 pmDCA-LHR

9h 40m1 stop

9:30 am - 3:51 pmLHR-DCA

11h 21m1 stop

$598Lufthansa

Find Deal

mar., oct. 7 - mié., oct. 15

7:00 pm - 10:10 amDCA-LHR

10h 10m1 stop

9:30 am - 3:51 pmLHR-DCA

11h 21m1 stop

$599Lufthansa

Find Deal

dom., sep. 14 - mar., sep. 23

3:00 pm - 5:55 amDCA-LHR

9h 55m1 stop

9:30 am - 3:51 pmLHR-DCA

11h 21m1 stop

$604United Airlines

Find Deal

mié., oct. 15 - mié., oct. 22

6:00 am - 8:40 pmDCA-LHR

9h 40m1 stop

3:20 pm - 9:37 pmLHR-DCA

11h 17m1 stop

$606United Airlines

Find Deal

mié., oct. 15 - mié., oct. 22

4:35 pm - 9:35 amDCA-LHR

12h 00m1 stop

9:30 am - 3:51 pmLHR-DCA

11h 21m1 stop

$607Air Canada

Find Deal

mar., oct. 7 - mié., oct. 15

9:40 am - 6:30 amDCA-LHR

15h 50m1 stop

6:50 am - 3:51 pmLHR-DCA

14h 01m2 stops

$614Air Canada

Find Deal

Useful Info

Low season	February
High season	July
Cheapest flight	$289

Best time to beat the crowds with an average 14% drop in price.

Most popular time to fly with an average 18% increase in price.

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 travelers 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 round-trip 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.

Hounslow

Wembley

Slough

Hayes

Richmond

Luton

Salisbury

Ilford

Northampton

Crawley

Guildford

Watford

Eastbourne

Kingston upon Thames

Swindon

Deal

Harrow

Hastings

Southall

St. Albans

Everything you need to know for your flight to Heathrow

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Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

London Heathrow Airport (LHR)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

LHR

$289 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 round-trip 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

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 travelers 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 round-trip 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?

Traveling 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 rental

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