How does KAYAK find such low prices on flights from District of Columbia to London?

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. 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?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London 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?

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 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?

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 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>

$247 CHEAP FLIGHTS from District of Columbia to London

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Flight Deals

Cheap Flights from District of Columbia to London

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 London 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 London

Wed, Nov 12 - Wed, Nov 19

9:45 am - 6:00 pmIAD-STN

27h 15m2 stops

8:55 pm - 3:50 pmSTN-IAD

23h 55m2 stops

$552Multiple Airlines

Find Deal

Wed, Jan 28 - Tue, Feb 3

8:30 pm - 6:30 pmIAD-LHR

17h 00m1 stop

5:30 pm - 5:15 pmLHR-IAD

28h 45m2 stops

$552Scandinavian Airlines

Find Deal

Sun, Nov 16 - Mon, Dec 1

8:30 pm - 5:50 pmIAD-LGW

16h 20m1 stop

6:40 pm - 4:40 pmLGW-IAD

27h 00m1 stop

$553SWISS

Find Deal

Mon, Nov 17 - Tue, Dec 2

5:30 pm - 3:45 pmIAD-LGW

17h 15m1 stop

4:35 pm - 9:00 pmLGW-IAD

33h 25m1 stop

$554TAP AIR PORTUGAL

Find Deal

Mon, Jan 5 - Mon, Jan 12

7:40 pm - 7:30 pmIAD-LHR

18h 50m1 stop

12:15 pm - 6:30 pmLHR-IAD

11h 15m1 stop

$554Icelandair

Find Deal

Mon, Dec 8 - Fri, Jan 30

8:19 am - 7:30 amDCA-LGW

18h 11m1 stop

11:20 am - 11:12 pmLGW-DCA

16h 52m1 stop

$554British Airways

Find Deal

Mon, Dec 29 - Thu, Jan 15

8:30 pm - 4:20 pmIAD-LHR

14h 50m1 stop

9:00 am - 4:40 pmLHR-IAD

12h 40m1 stop

$555SWISS

Find Deal

Mon, Jan 5 - Fri, Jan 16

7:40 pm - 10:55 amIAD-LGW

10h 15m1 stop

11:55 am - 6:30 pmLGW-IAD

11h 35m1 stop

$555Icelandair

Find Deal

Fri, Nov 28 - Sat, Dec 6

10:30 pm - 6:55 pmIAD-LHR

15h 25m1 stop

6:00 am - 3:15 pmLHR-IAD

14h 15m1 stop

$559TAP AIR PORTUGAL

Find Deal

Wed, Oct 22 - Tue, Nov 4

7:06 pm - 11:05 amDCA-LHR

10h 59m1 stop

3:35 pm - 9:30 pmLHR-DCA

10h 55m1 stop

$595British Airways

Find Deal

Cheapest round-trip

$552

Multiple Airlines

Wed 11/12Wed 11/19

IAD - STN • 2 stops

Cheapest non-stop

$554

Typical prices: $690-$1,128

Virgin Atlantic

Wed 11/26Wed 12/3

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 London!

Useful Info

Low season	February
High season	April
Cheapest flight	$247

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

Most popular time to fly and prices are also 3% lower on average.

Flight from Reagan Washington National 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?
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.
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?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London 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?
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 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?
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 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

Crawley

Guildford

Watford

Kingston upon Thames

Eastbourne

Colchester

Ipswich

St. Albans

Harrow

Hastings

Worthing

Bedford

Maidenhead

Everything you need to know for your flight to London

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Cabin class types available on flights to District of Columbia

First Class flights to Londonfrom $4,187

Business Class flights to Londonfrom $2,343

Prem Econ Class flights to Londonfrom $1,426

Economy Class flights to Londonfrom $571

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

$247 Find Cheap Flights from District of Columbia to London

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

Cheap Flights from District of Columbia to London

Recent round-trip flight deals from District of Columbia to London

Recent one-way flight deals from District of Columbia to London

Recent last minute flight deals from District of Columbia to London

Recent direct flight deals from District of Columbia to London

Everything you should know

Good to know

Flights from District of Columbia to London: the best tips from KAYAK users

FAQs for booking flights from District of Columbia to London

How does KAYAK find such low prices on flights from District of Columbia to London?

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.

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?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London 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?

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 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?

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 from District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near London?

Everything you need to know for your flight to London

Cabin class types available on flights to District of Columbia

Complete your trip to London with a hotel stay or car rental

Find direct flights for London

Flights to other popular destinations

Flights from domestic origins to London

Choose which airport to fly into in London

Find deals for your return flight