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>

$208 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

Mon, Aug 18 - Mon, Aug 25

10:20 pm - 5:45 pmIAD-LHR

14h 25m1 stop

6:45 pm - 3:20 pmLHR-IAD

25h 35m1 stop

$424TAP AIR PORTUGAL

Find Deal

Wed, Sep 10 - Fri, Sep 19

10:20 pm - 3:35 pmIAD-LHR

12h 15m1 stop

8:00 am - 3:20 pmLHR-IAD

12h 20m1 stop

$426TAP AIR PORTUGAL

Find Deal

Wed, Oct 29 - Sun, Nov 16

9:30 pm - 4:00 pmIAD-LHR

14h 30m1 stop

9:05 pm - 5:15 pmLHR-IAD

25h 10m2 stops

$434Scandinavian Airlines

Find Deal

Wed, Oct 29 - Sun, Nov 16

9:30 pm - 4:25 pmIAD-LHR

14h 55m2 stops

9:05 pm - 5:15 pmLHR-IAD

25h 10m2 stops

$438Scandinavian Airlines

Find Deal

Wed, Aug 27 - Wed, Sep 3

12:55 pm - 8:35 amDCA-LHR

14h 40m1 stop

9:30 am - 9:51 pmLHR-DCA

17h 21m1 stop

$443Air Canada

Find Deal

Wed, Aug 27 - Wed, Sep 3

6:30 pm - 10:30 amIAD-LHR

11h 00m1 stop

9:00 am - 4:20 pmLHR-IAD

12h 20m1 stop

$454Virgin Atlantic

Find Deal

Wed, Aug 27 - Wed, Sep 3

6:30 pm - 10:30 amIAD-LHR

11h 00m1 stop

12:35 pm - 4:00 pmLHR-IAD

8h 25mnonstop

$459Virgin Atlantic

Find Deal

Tue, Aug 26 - Tue, Sep 2

6:35 pm - 6:55 amIAD-LHR

7h 20mnonstop

4:40 pm - 7:55 pmLHR-IAD

8h 15mnonstop

$471Lufthansa

Find Deal

Tue, Aug 26 - Tue, Sep 2

6:00 am - 10:00 amDCA-LHR

23h 00m1 stop

6:50 am - 3:51 pmLHR-DCA

14h 01m2 stops

$473Air Canada

Find Deal

Sun, Aug 10 - Tue, Aug 19

5:30 pm - 11:25 amDCA-LHR

12h 55m1 stop

9:30 am - 4:21 pmLHR-DCA

11h 51m1 stop

$541Lufthansa

Find Deal

Useful Info

Low season	February
High season	July
Cheapest flight	$208

Best time to beat the crowds with an average 15% drop in price.

Most popular time to fly with an average 21% 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.

Ilford

Deal

Southall

St. Albans

Folkestone

Chipping Campden

Barnet

Bishop's Stortford

Ascot

Enfield

Ely

Rye

Edgware

Weybridge

Alton

Woodstock

Christchurch

Beaconsfield

Hatfield

Dorking

Everything you need to know for your flight to Heathrow

Airports

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

$208 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