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.

$321 CHEAP FLIGHTS from District of Columbia to London

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Cheap Flights from District of Columbia to London

Cheap flights from District of Columbia to London with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Sun, Nov 15 - Tue, Nov 24

7:40 pm - 10:45 pmIAD Washington, D.C. Dulles Intl-STN London Stansted

22h 05m2 stops Reykjavik Keflavik Intl Dublin

7:15 am - 6:30 pmSTN London Stansted-IAD Washington, D.C. Dulles Intl

16h 15m2 stops Dublin Reykjavik Keflavik Intl

$670Multiple Airlines

Fri, Jan 8 - Thu, Jan 14

7:40 pm - 1:55 pmIAD Washington, D.C. Dulles Intl-LTN London Luton

13h 15m1 stop Reykjavik Keflavik Intl

6:00 am - 6:30 pmLTN London Luton-IAD Washington, D.C. Dulles Intl

17h 30m1 stop Reykjavik Keflavik Intl

$674Multiple Airlines

Wed, Dec 2 - Wed, Dec 23

10:30 pm - 3:05 pmIAD Washington, D.C. Dulles Intl-LGW London Gatwick

11h 35m1 stop Lisbon Humberto Delgado

10:40 am - 8:30 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

14h 50m1 stop Lisbon Humberto Delgado

$674TAP AIR PORTUGAL

Sat, Dec 5 - Tue, Dec 8

5:25 pm - 12:40 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 15m1 stop Lisbon Humberto Delgado

6:00 am - 2:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 40m1 stop Lisbon Humberto Delgado

$675TAP AIR PORTUGAL

Mon, Nov 16 - Wed, Nov 25

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

$683Icelandair

Fri, Jan 29 - Mon, Feb 8

5:50 pm - 11:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 00m1 stop Madrid Barajas

6:15 am - 4:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 15m1 stop Madrid Barajas

$685Iberia

Tue, Nov 10 - Wed, Nov 18

7:40 pm - 10:55 amIAD Washington, D.C. Dulles Intl-LGW London Gatwick

10h 15m1 stop Reykjavik Keflavik Intl

11:55 am - 6:30 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

11h 35m1 stop Reykjavik Keflavik Intl

$687Icelandair

Thu, Jan 14 - Sun, Jan 17

8:30 pm - 12:55 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

59h 25m2 stops Kastrup Copenhagen Stockholm Arlanda

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

26h 45m1 stop Kastrup Copenhagen

$688Scandinavian Airlines

Mon, Feb 1 - Sun, Feb 14

5:50 pm - 6:50 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

20h 00m1 stop Madrid Barajas

4:05 pm - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

29h 15m1 stop Madrid Barajas

$689Iberia

Wed, Jan 20 - Sat, Jan 23

8:30 pm - 4:25 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

38h 55m2 stops Kastrup Copenhagen Oslo Gardermoen

10:20 am - 6:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 30m1 stop Kastrup Copenhagen

$694Scandinavian Airlines

Sun, Oct 25 - Wed, Nov 4

11:30 pm - 9:50 amIAD Washington, D.C. Dulles Intl-LGW London Gatwick

30h 20m1 stop Lisbon Humberto Delgado

4:35 pm - 3:15 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

27h 40m1 stop Lisbon Humberto Delgado

$702TAP AIR PORTUGAL

Wed, Oct 21 - Wed, Nov 11

5:45 pm - 8:30 pmIAD Washington, D.C. Dulles Intl-LGW London Gatwick

21h 45m2 stops Lisbon Humberto Delgado Porto

10:40 am - 3:15 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

33h 35m1 stop Lisbon Humberto Delgado

$715TAP AIR PORTUGAL

Sun, Oct 25 - Wed, Nov 4

8:40 pm - 3:05 pmIAD Washington, D.C. Dulles Intl-LTN London Luton

14h 25m1 stop Reykjavik Keflavik Intl

8:00 am - 6:30 pmLTN London Luton-IAD Washington, D.C. Dulles Intl

15h 30m1 stop Reykjavik Keflavik Intl

$741Multiple Airlines

Fri, Oct 23 - Wed, Oct 28

4:00 pm - 4:55 pmIAD Washington, D.C. Dulles Intl-STN London Stansted

19h 55m2 stops Toronto Pearson Intl Madrid Barajas

8:20 pm - 9:05 pmSTN London Stansted-IAD Washington, D.C. Dulles Intl

28h 45m2 stops Madrid Barajas Munich Franz Josef Strauss

$761Multiple Airlines

Tue, Oct 20 - Wed, Dec 9

3:38 pm - 6:30 amDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 52m1 stop Boston Logan Intl

9:20 am - 6:00 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

13h 40m1 stop Boston Logan Intl

$774JetBlue

Tue, Oct 20 - Sat, Oct 31

6:20 am - 8:45 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 25m1 stop New York John F Kennedy Intl

9:20 am - 7:01 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

13h 41m1 stop Boston Logan Intl

$792JetBlue

Sat, Oct 24 - Sat, Oct 31

8:20 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 40m1 stop Kastrup Copenhagen

6:40 am - 7:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 10m1 stop Kastrup Copenhagen

$804Scandinavian Airlines

Sat, Oct 24 - Sat, Oct 31

8:20 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 40m1 stop Kastrup Copenhagen

6:40 am - 7:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 10m2 stops Oslo Gardermoen Kastrup Copenhagen

$820Scandinavian Airlines

Tue, Oct 20 - Tue, Oct 27

8:20 pm - 4:25 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 05m1 stop Zurich

9:00 am - 6:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 00m1 stop Zurich

$857SWISS

Tue, Oct 20 - Tue, Oct 27

8:20 pm - 12:35 pmIAD Washington, D.C. Dulles Intl-LCY London City

11h 15m1 stop Zurich

9:15 am - 6:00 pmLCY London City-IAD Washington, D.C. Dulles Intl

12h 45m1 stop Zurich

$875SWISS

Wed, Nov 18 - Wed, Nov 25

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

$717British Airways

Wed, Nov 18 - Tue, Nov 24

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

$726British Airways

Sun, Nov 15 - Tue, Nov 24

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

$832Virgin Atlantic

Sun, Nov 15 - Tue, Nov 24

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

$838Finnair

Sun, Nov 15 - Tue, Nov 24

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

$852Finnair

Mon, Mar 1 - Mon, Mar 29

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

7h 15mnonstop

12:35 pm - 3:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 15mnonstop

$854Iberia

Tue, Jan 19 - Tue, Jan 26

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

$865Iberia

Sat, Jan 16 - Sun, Jan 24

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

7h 25mnonstop

1:05 pm - 4:45 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mnonstop

$873Virgin Atlantic

Mon, Feb 1 - Sun, Feb 14

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

7h 25mnonstop

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

8h 25mnonstop

$880Multiple Airlines

Wed, Feb 3 - Wed, Feb 10

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

$888Multiple Airlines

Low season	February
High season	March
Cheapest flight	$321

Best time to beat the crowds with an average 27% 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

Bedford

Crawley

Watford

Harrow

Twickenham

Ipswich

St. Albans

Folkestone

Colchester

Woodbridge

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Car rentals in London

$321 Find Cheap Flights from District of Columbia to London - Compare and Save

Cheap Flights from District of Columbia to London

Cheap flights from District of Columbia to London with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

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