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>

$375 CHEAP FLIGHTS from District of Columbia to London Heathrow (LHR)

LHR

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

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Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$577

Typical prices: $635-$847

Scandinavian Airlines

Wed 4/15Sun 4/19

IAD - LHR • 2 stops

Cheapest non-stop

$612

Typical prices: $659-$854

Virgin Atlantic

Tue 1/13Tue 1/20

IAD - LHR • Non-stop

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KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Heathrow!

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 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

Wed, Apr 15 - Sun, Apr 19

8:20 pm - 4:25 pm

IAD

LHR

15h 05m2 stops

10:20 am - 4:50 pm

LHR

IAD

11h 30m1 stop

$577Scandinavian Airlines

Fri, Apr 17 - Wed, Apr 22

8:20 pm - 4:25 pm

IAD

LHR

15h 05m2 stops

7:05 am - 4:50 pm

LHR

IAD

14h 45m2 stops

$578Scandinavian Airlines

Mon, Jan 12 - Sun, Jan 25

8:30 pm - 4:25 pm

IAD

LHR

14h 55m2 stops

1:55 pm - 3:20 pm

LHR

IAD

30h 25m2 stops

$579Scandinavian Airlines

Sat, Mar 21 - Sat, Apr 11

9:30 pm - 6:30 pm

IAD

LHR

17h 00m1 stop

6:40 am - 4:50 pm

LHR

IAD

15h 10m1 stop

$580Scandinavian Airlines

Fri, May 1 - Mon, May 4

10:35 pm - 5:45 pm

IAD

LHR

14h 10m1 stop

7:50 pm - 8:35 pm

LHR

IAD

29h 45m1 stop

$581TAP AIR PORTUGAL

Fri, Jan 16 - Fri, Jan 23

5:17 pm - 11:15 am

IAD

LHR

12h 58m1 stop

1:30 pm - 8:15 pm

LHR

IAD

11h 45m1 stop

$582Multiple Airlines

Fri, Feb 13 - Fri, Feb 20

5:17 pm - 11:15 am

IAD

LHR

12h 58m1 stop

1:30 pm - 8:15 pm

LHR

IAD

11h 45m1 stop

$584Multiple Airlines

Wed, May 13 - Thu, May 21

11:35 pm - 8:20 pm

IAD

LHR

15h 45m1 stop

9:25 pm - 7:20 pm

LHR

IAD

26h 55m1 stop

$585Icelandair

Sun, Feb 8 - Tue, Feb 24

12:55 pm - 9:20 am

DCA

LHR

15h 25m1 stop

6:50 am - 3:33 pm

LHR

DCA

13h 43m2 stops

$592Air Canada

Sun, Feb 8 - Tue, Feb 24

12:55 pm - 7:10 am

DCA

LHR

13h 15m2 stops

6:50 am - 3:33 pm

LHR

DCA

13h 43m2 stops

$596Air Canada

Useful Info

Low season	January
High season	July
Cheapest flight	$375

Best time to beat the crowds with an average 10% drop in price.

Most popular time to fly with an average 17% increase in price.

Flight from Washington Dulles Airport to London Heathrow Airport

DeeFlew with United Airlines

IAD

LHR

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

IAD

LHR

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

IAD

LHR

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 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

Slough

Wembley

Hayes

Richmond

Luton

Ilford

Salisbury

Crawley

Watford

Guildford

Eastbourne

Kingston upon Thames

Swindon

Colchester

Northampton

St. Albans

Ipswich

Twickenham

Bedford

Everything you need to know for your flight to Heathrow

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Complete your trip

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Origins

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Return flight deals

Information on your arrival and departure airports

London Heathrow Airport (LHR)

LHR

$375 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

Everything you should know

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

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