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.

$319 CHEAP FLIGHTS from District of Columbia to London

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap Flights from District of Columbia to London

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, Jan 6 - Wed, Jan 13

7:40 pm - 10:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 10m1 stop Reykjavik Keflavik Intl

12:15 pm - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 15m1 stop Reykjavik Keflavik Intl

$672Icelandair

Sun, Nov 29 - Tue, Dec 8

7:40 pm - 9:35 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

20h 55m3 stops Reykjavik Keflavik Intl Stockholm Arlanda Oslo Gardermoen

6:40 am - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

16h 50m2 stops Stockholm Arlanda Reykjavik Keflavik Intl

$672Multiple Airlines

Tue, Apr 20 - Tue, Apr 27

8:10 pm - 2:35 pmIAD Washington, D.C. Dulles Intl-STN London Stansted

13h 25m1 stop Kastrup Copenhagen

7:15 am - 5:00 pmSTN London Stansted-IAD Washington, D.C. Dulles Intl

14h 45m1 stop Kastrup Copenhagen

$672Multiple Airlines

Fri, Dec 11 - Wed, Dec 23

10:30 pm - 5:30 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 00m1 stop Lisbon Humberto Delgado

6:30 pm - 3:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

25h 45m1 stop Lisbon Humberto Delgado

$674TAP AIR PORTUGAL

Sun, Dec 6 - Sun, Dec 13

10:30 pm - 3:45 pmIAD Washington, D.C. Dulles Intl-LGW London Gatwick

12h 15m1 stop Lisbon Humberto Delgado

10:40 am - 8:35 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

14h 55m1 stop Lisbon Humberto Delgado

$674TAP AIR PORTUGAL

Mon, Nov 23 - Wed, Dec 9

7:40 pm - 7:30 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 50m1 stop Reykjavik Keflavik Intl

8:35 pm - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

$675Icelandair

Wed, Dec 16 - Sat, Dec 19

8:30 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 30m1 stop Kastrup Copenhagen

6:40 am - 6:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 10m1 stop Kastrup Copenhagen

$677Scandinavian Airlines

Mon, Dec 7 - Thu, Dec 10

8:30 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

39h 30m2 stops Kastrup Copenhagen Stockholm Arlanda

3:35 pm - 6:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

56h 15m2 stops Oslo Gardermoen Kastrup Copenhagen

$680Scandinavian Airlines

Wed, Feb 3 - Fri, Feb 5

6:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

6:15 am - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 05m1 stop Madrid Barajas

$705Iberia

Wed, Jan 13 - Thu, Jan 21

9:55 pm - 10:10 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 15mnonstop

7:30 am - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 50m1 stop Madrid Barajas

$860Iberia

Recent last minute flight deals from District of Columbia to London

Tue, Nov 3 - Mon, Nov 23

5:25 pm - 2:15 pmIAD Washington, D.C. Dulles Intl-LTN London Luton

15h 50m2 stops Lisbon Humberto Delgado Madrid Barajas

7:45 am - 2:40 pmLTN London Luton-IAD Washington, D.C. Dulles Intl

35h 55m2 stops Madrid Barajas Lisbon Humberto Delgado

$678Multiple Airlines

Sun, Nov 8 - Mon, Nov 23

8:30 pm - 2:55 pmIAD Washington, D.C. Dulles Intl-STN London Stansted

13h 25m1 stop Reykjavik Keflavik Intl

8:05 am - 6:30 pmSTN London Stansted-IAD Washington, D.C. Dulles Intl

15h 25m1 stop Reykjavik Keflavik Intl

$684Multiple Airlines

Tue, Nov 3 - Thu, Nov 12

5:25 pm - 9:35 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

23h 10m1 stop Lisbon Humberto Delgado

6:00 am - 3:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 15m1 stop Lisbon Humberto Delgado

$696TAP AIR PORTUGAL

Sun, Nov 8 - Mon, Nov 23

10:30 pm - 8:35 pmIAD Washington, D.C. Dulles Intl-LGW London Gatwick

17h 05m2 stops Lisbon Humberto Delgado Porto

4:35 pm - 2:40 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

27h 05m1 stop Lisbon Humberto Delgado

$697TAP AIR PORTUGAL

Sun, Nov 8 - Thu, Nov 19

7:40 pm - 10:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 10m1 stop Reykjavik Keflavik Intl

12:15 pm - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 15m1 stop Reykjavik Keflavik Intl

$750Icelandair

Thu, Nov 5 - Wed, Feb 24

8:30 pm - 6:30 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

17h 00m1 stop Kastrup Copenhagen

7:30 pm - 5:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 45m1 stop Kastrup Copenhagen

$750Scandinavian Airlines

Sun, Nov 8 - Mon, Feb 22

7:40 pm - 10:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 10m1 stop Reykjavik Keflavik Intl

12:15 pm - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 15m1 stop Reykjavik Keflavik Intl

$752Icelandair

Thu, Nov 5 - Wed, Feb 24

8:30 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 30m1 stop Kastrup Copenhagen

7:05 am - 5:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 10m2 stops Oslo Gardermoen Kastrup Copenhagen

$752Scandinavian Airlines

Fri, Nov 6 - Wed, Nov 11

6:15 am - 8:55 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 40m1 stop New York John F Kennedy Intl

9:20 am - 3:55 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

11h 35m1 stop Boston Logan Intl

$775JetBlue

Fri, Nov 6 - Thu, Nov 12

6:15 am - 8:55 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 40m1 stop New York John F Kennedy Intl

7:25 am - 10:15 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

19h 50m1 stop New York John F Kennedy Intl

$775JetBlue

Recent direct flight deals from District of Columbia to London

Wed, Mar 24 - Wed, Mar 31

7:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

5:05 pm - 8:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 15mnonstop

$727Multiple Airlines

Thu, Dec 3 - Tue, Dec 8

6:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

4:25 pm - 7:55 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mnonstop

$784Multiple Airlines

Thu, Feb 18 - Mon, Mar 1

9:45 pm - 10:00 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 15mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$830British Airways

Wed, Dec 16 - Sat, Dec 19

9:55 pm - 10:10 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 15mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$846British Airways

Sun, Nov 29 - Tue, Dec 8

6:55 pm - 7:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mnonstop

1:20 pm - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mnonstop

$875Virgin Atlantic

Wed, Feb 10 - Wed, Feb 17

6:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$876Iberia

Tue, Feb 9 - Tue, Feb 16

6:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$876Iberia

Wed, Feb 3 - Wed, Feb 17

6:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

4:25 pm - 7:55 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mnonstop

$877Finnair

Tue, Dec 8 - Tue, Dec 15

9:45 pm - 10:00 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 15mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$880Finnair

Sun, Nov 29 - Tue, Dec 8

6:55 pm - 7:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mnonstop

1:20 pm - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mnonstop

$882Virgin Atlantic

Useful Info

Low season	February
High season	March
Cheapest flight	$319

Best time to beat the crowds with an average 28% drop in price.

Most popular time to fly and prices are also 18% lower on average.

Flight from Washington Dulles Airport to London Heathrow Airport

DeeFlew with United Airlines-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-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-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?
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

Hayes

Slough

Richmond

Wembley

Luton

Eastbourne

Ilford

Kingston upon Thames

Guildford

Crawley

Bedford

Watford

Harrow

Ipswich

Folkestone

St. Albans

Colchester

Woodbridge

Horley

More options for your flight to London

Add a hotel or car rental

Cabin class

Direct Flights

Origins

Other airports

Other destinations

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

Car rentals in London

$319 Find Cheap Flights from District of Columbia to London - Compare and Save

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

Good to know

Low season

High season

Cheapest flight

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

FAQs for booking flights from District of Columbia to London

Traveling to a place near London?

More options for your flight to London

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

Cabin class types available on flights to District of Columbia

Find direct flights for London

Flights from domestic origins to London

Choose which airport to fly into in London

Flights to other popular destinations