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>

$332 CHEAP FLIGHTS from District of Columbia to London Heathrow (LHR)

LHR

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Cheap Flights from District of Columbia to Heathrow

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

Sun, Apr 26 - Sun, May 3

8:20 pm - 4:00 pm

IAD

LHR

14h 40m

1 stop

6:40 am - 5:00 pm

LHR

IAD

39h 20m

2 stops

$604Scandinavian Airlines

Mon, Apr 13 - Fri, Apr 24

8:20 pm - 4:25 pm

IAD

LHR

15h 05m

2 stops

10:20 am - 5:00 pm

LHR

IAD

11h 40m

1 stop

$606Scandinavian Airlines

Tue, Apr 21 - Mon, May 4

5:05 pm - 5:45 pm

IAD

LHR

19h 40m

1 stop

7:50 pm - 3:10 pm

LHR

IAD

24h 20m

1 stop

$607TAP AIR PORTUGAL

Tue, Apr 28 - Wed, May 6

5:05 pm - 6:50 pm

IAD

LHR

20h 45m

1 stop

6:00 am - 3:10 pm

LHR

IAD

14h 10m

1 stop

$608TAP AIR PORTUGAL

Mon, Apr 20 - Wed, Apr 29

8:20 pm - 4:25 pm

IAD

LHR

15h 05m

2 stops

7:05 am - 5:00 pm

LHR

IAD

14h 55m

2 stops

$609Scandinavian Airlines

Wed, Apr 8 - Mon, Apr 13

10:35 pm - 10:55 pm

IAD

LHR

19h 20m

1 stop

7:50 pm - 3:10 pm

LHR

IAD

24h 20m

1 stop

$611TAP AIR PORTUGAL

Sun, Apr 26 - Sun, May 3

8:20 pm - 4:00 pm

IAD

LHR

14h 40m

1 stop

6:40 am - 5:00 pm

LHR

IAD

15h 20m

2 stops

$614Scandinavian Airlines

Mon, Mar 30 - Tue, Apr 7

12:55 pm - 6:30 am

DCA

LHR

12h 35m

1 stop

2:05 pm - 9:55 pm

LHR

DCA

12h 50m

1 stop

$706Air Canada

Mon, Mar 30 - Tue, Apr 7

12:55 pm - 6:30 am

DCA

LHR

12h 35m

1 stop

9:30 am - 9:55 pm

LHR

DCA

17h 25m

1 stop

$709Air Canada

Wed, Apr 15 - Wed, Apr 22

12:55 pm - 6:30 am

DCA

LHR

12h 35m

2 stops

6:50 am - 3:30 pm

LHR

DCA

13h 40m

2 stops

$719Air Canada

Useful Info

Low season	January
High season	July
Cheapest flight	$332

Best time to beat the crowds with an average 12% drop in price.

Most popular time to fly with an average 15% 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

Salisbury

Ilford

Crawley

Watford

Guildford

Bedford

Colchester

Eastbourne

St. Albans

Swindon

Ipswich

Northampton

Twickenham

Kingston upon Thames

Everything you need to know for your flight to Heathrow

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London Heathrow Airport (LHR)

LHR

$332 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

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