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.

$328 CHEAP FLIGHTS from District of Columbia to London

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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, Dec 9 - Wed, Dec 16

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

18h 50m1 stop Reykjavik Keflavik Intl

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

11h 15m1 stop Reykjavik Keflavik Intl

$688Icelandair

Thu, Nov 12 - Tue, Nov 17

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

$688Icelandair

Sat, Dec 5 - Mon, Dec 7

8:30 pm - 9:20 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

19h 50m2 stops Kastrup Copenhagen Stockholm Arlanda

7:30 pm - 11:49 amLHR London Heathrow-IAD Washington, D.C. Dulles Intl

45h 19m2 stops Kastrup Copenhagen New York John F Kennedy Intl

$690Scandinavian Airlines

Sat, Nov 7 - Mon, Nov 9

8:30 pm - 7:55 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 25m2 stops Kastrup Copenhagen Stockholm Arlanda

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

15h 10m2 stops Oslo Gardermoen Kastrup Copenhagen

$690Scandinavian Airlines

Sat, Oct 31 - Thu, Nov 5

8:40 pm - 10:50 pmIAD Washington, D.C. Dulles Intl-STN London Stansted

22h 10m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen

7:40 pm - 6:30 pmSTN London Stansted-IAD Washington, D.C. Dulles Intl

27h 50m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl

$690Multiple Airlines

Thu, Dec 17 - Fri, Mar 5

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

11h 00m1 stop Toronto Pearson Intl

1:00 pm - 8:17 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 17m1 stop Montreal Pierre Elliott Trudeau Intl

$691Air Canada

Sat, Jan 16 - Mon, Jan 25

7:40 pm - 1:05 pmIAD Washington, D.C. Dulles Intl-LTN London Luton

12h 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

$691Multiple Airlines

Thu, Dec 17 - Sun, Jan 3

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

11h 00m1 stop Toronto Pearson Intl

11:10 am - 8:10 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 00m1 stop Toronto Pearson Intl

$692Air Canada

Fri, Jan 15 - Mon, Jan 18

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

14h 00m1 stop Lisbon Humberto Delgado

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

14h 15m1 stop Lisbon Humberto Delgado

$692TAP AIR PORTUGAL

Wed, Oct 28 - Wed, Nov 4

11:30 pm - 3:05 pmIAD Washington, D.C. Dulles Intl-LGW London Gatwick

11h 35m1 stop Lisbon Humberto Delgado

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

27h 40m1 stop Lisbon Humberto Delgado

$694TAP AIR PORTUGAL

Recent last minute flight deals from District of Columbia to London

Tue, Oct 6 - Tue, Oct 13

9:55 am - 2:00 pmIAD Washington, D.C. Dulles Intl-LTN London Luton

23h 05m2 stops Toronto Pearson Intl Madrid Barajas

1:40 pm - 7:25 pmLTN London Luton-IAD Washington, D.C. Dulles Intl

34h 45m2 stops Madrid Barajas Munich Franz Josef Strauss

$700Multiple Airlines

Tue, Oct 6 - Tue, Oct 13

9:55 am - 4:00 pmIAD Washington, D.C. Dulles Intl-STN London Stansted

25h 05m2 stops Toronto Pearson Intl Madrid Barajas

12:30 pm - 7:25 pmSTN London Stansted-IAD Washington, D.C. Dulles Intl

35h 55m2 stops Madrid Barajas Munich Franz Josef Strauss

$709Multiple Airlines

Mon, Oct 5 - Mon, Nov 9

10:35 pm - 9:45 amIAD Washington, D.C. Dulles Intl-LGW London Gatwick

30h 10m1 stop Lisbon Humberto Delgado

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

27h 05m1 stop Lisbon Humberto Delgado

$756TAP AIR PORTUGAL

Mon, Oct 5 - Mon, Nov 9

10:35 pm - 12:45 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

33h 10m1 stop Lisbon Humberto Delgado

6:30 pm - 2:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

25h 10m1 stop Lisbon Humberto Delgado

$757TAP AIR PORTUGAL

Tue, Oct 6 - Mon, Nov 2

8:30 pm - 2:40 pmIAD Washington, D.C. Dulles Intl-LGW London Gatwick

13h 10m1 stop Reykjavik Keflavik Intl

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

11h 35m1 stop Reykjavik Keflavik Intl

$801Icelandair

Tue, Oct 6 - Thu, Oct 22

8:30 pm - 11:55 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 25m1 stop Reykjavik Keflavik Intl

9:25 pm - 7:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

$812Icelandair

Wed, Oct 7 - Sat, Oct 17

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

15h 40m2 stops Kastrup Copenhagen Stockholm Arlanda

10:35 am - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

35h 25m2 stops Oslo Gardermoen Kastrup Copenhagen

$813Scandinavian Airlines

Sat, Oct 3 - Sun, Oct 11

7:25 pm - 6:30 amDCA Washington, D.C. Reagan-National-LHR London Heathrow

30h 05m1 stop Boston Logan Intl

8:15 am - 10:59 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

19h 44m1 stop New York John F Kennedy Intl

$857JetBlue

Mon, Oct 5 - Sat, Oct 24

8:20 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 40m1 stop Kastrup Copenhagen

6:40 am - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 20m1 stop Kastrup Copenhagen

$865Scandinavian Airlines

Tue, Oct 6 - Mon, Nov 2

8:55 am - 6:30 amDCA Washington, D.C. Reagan-National-LHR London Heathrow

16h 35m1 stop Boston Logan Intl

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

13h 40m1 stop Boston Logan Intl

$871JetBlue

Recent direct flight deals from District of Columbia to London

Wed, Oct 28 - Thu, Nov 5

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

7h 15mnonstop

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

8h 30mnonstop

$733British Airways

Sat, Dec 12 - Tue, Mar 2

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

$791British Airways

Wed, Jan 6 - Wed, Feb 3

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

$808Multiple Airlines

Tue, Jan 5 - Wed, Feb 3

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

$808Multiple Airlines

Sun, Jan 17 - Sun, Jan 24

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

7h 15mnonstop

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

8h 30mnonstop

$810Iberia

Tue, Dec 1 - 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

$819Finnair

Sun, Mar 14 - Sat, Mar 20

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

7h 10mnonstop

4:25 pm - 8:55 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mnonstop

$829Iberia

Tue, Dec 1 - Wed, Dec 9

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

$844Finnair

Sun, Nov 8 - Tue, Nov 17

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

$846Virgin Atlantic

Wed, Nov 11 - Thu, Nov 19

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

$861Virgin Atlantic

Useful Info

Low season	February
High season	December
Cheapest flight	$328

Best time to beat the crowds with an average 26% drop in price.

Most popular time to fly with an average 20% increase in price.

Flight from Washington Dulles Airport to London City

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

Guildford

Bedford

Kingston upon Thames

Crawley

Watford

Twickenham

Harrow

St. Albans

Ipswich

Folkestone

Colchester

Horley

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$328 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

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

FAQs for booking flights from District of Columbia to London

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