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>

$370 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

$576

Overall average: $710

Icelandair

Fri 1/9Sun 1/18

IAD - LHR • 1 stop

Cheapest non-stop

$592

Typical prices: $660-$860

Air France

Thu 1/8Wed 1/14

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

Fri, Jan 9 - Sun, Jan 18

7:40 pm - 10:50 am

IAD

LHR

10h 10m1 stop

8:35 pm - 6:30 pm

LHR

IAD

26h 55m1 stop

$576Icelandair

Mon, Mar 2 - Fri, Mar 6

12:05 pm - 9:20 am

DCA

LHR

16h 15m2 stops

6:40 am - 10:12 pm

LHR

DCA

20h 32m2 stops

$577Scandinavian Airlines

Fri, Jan 16 - Tue, Jan 20

10:30 pm - 10:40 pm

IAD

LHR

19h 10m1 stop

6:30 pm - 9:00 pm

LHR

IAD

31h 30m1 stop

$577TAP AIR PORTUGAL

Tue, Jan 20 - Tue, Jan 27

11:10 am - 4:00 pm

DCA

LHR

23h 50m2 stops

6:40 am - 10:48 pm

LHR

DCA

21h 08m2 stops

$578Scandinavian Airlines

Thu, Feb 12 - Mon, Mar 2

8:30 pm - 9:40 pm

IAD

LHR

20h 10m1 stop

10:20 am - 5:15 pm

LHR

IAD

11h 55m1 stop

$578Scandinavian Airlines

Fri, Jan 16 - Tue, Jan 20

5:17 pm - 11:15 am

IAD

LHR

12h 58m1 stop

7:30 am - 2:35 pm

LHR

IAD

12h 05m1 stop

$579Multiple Airlines

Mon, Jan 19 - Sat, Jan 24

11:10 am - 4:00 pm

DCA

LHR

23h 50m2 stops

5:00 pm - 10:48 pm

LHR

DCA

34h 48m2 stops

$579Scandinavian Airlines

Wed, Feb 4 - Fri, Feb 13

12:55 pm - 9:20 am

DCA

LHR

15h 25m1 stop

6:50 am - 9:58 pm

LHR

DCA

20h 08m2 stops

$582Multiple Airlines

Thu, Jan 15 - Mon, Jan 19

8:30 pm - 1:00 pm

IAD

LHR

11h 30m1 stop

1:45 pm - 3:10 pm

LHR

IAD

30h 25m1 stop

$584SWISS

Mon, Jan 12 - Sun, Jan 18

4:10 pm - 7:10 am

DCA

LHR

10h 00m1 stop

6:50 am - 3:33 pm

LHR

DCA

13h 43m2 stops

$590Air Canada

Useful Info

Low season	January
High season	July
Cheapest flight	$370

Best time to beat the crowds with an average 11% drop in price.

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

Flight from Reagan Washington National 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

Salisbury

Ilford

Crawley

Watford

Guildford

Eastbourne

Kingston upon Thames

Swindon

Colchester

St. Albans

Ipswich

Twickenham

Northampton

Bedford

Everything you need to know for your flight to Heathrow

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Complete your trip

Direct Flights

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Origins

Other airports

Return flight deals

Information on your arrival and departure airports

London Heathrow Airport (LHR)

LHR

$370 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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