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.

$272 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

Thu, Oct 29 - Mon, Nov 9

6:25 pm - 11:25 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 00m1 stop Lisbon Humberto Delgado

6:30 pm - 2:45 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

25h 15m1 stop Lisbon Humberto Delgado

$624TAP AIR PORTUGAL

Thu, Oct 29 - Thu, Nov 5

6:25 pm - 12:40 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 15m1 stop Lisbon Humberto Delgado

7:55 pm - 8:35 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

29h 40m1 stop Lisbon Humberto Delgado

$624TAP AIR PORTUGAL

Sat, Sep 26 - Fri, Oct 16

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

$624Scandinavian Airlines

Thu, Nov 5 - Sun, Nov 8

8:30 pm - 4:20 pmIAD Washington, D.C. Dulles Intl-LGW London Gatwick

14h 50m2 stops Kastrup Copenhagen Stockholm Arlanda

8:35 pm - 5:15 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

25h 40m2 stops Stockholm Arlanda Kastrup Copenhagen

$624Multiple Airlines

Mon, Sep 7 - Wed, Sep 16

8:20 pm - 10:20 amIAD Washington, D.C. Dulles Intl-LGW London Gatwick

33h 00m3 stops Kastrup Copenhagen Helsinki-Vantaa Stockholm Arlanda

11:00 am - 5:00 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

35h 00m3 stops Stockholm Arlanda Helsinki-Vantaa Kastrup Copenhagen

$625Multiple Airlines

Fri, Oct 16 - Mon, Oct 19

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

39h 40m2 stops Kastrup Copenhagen Stockholm Arlanda

10:20 am - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 40m1 stop Kastrup Copenhagen

$626Scandinavian Airlines

Mon, Dec 7 - Tue, Dec 8

5:05 pm - 10:10 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

12h 05m1 stop Dublin

12:10 pm - 7:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 20m1 stop Dublin

$639Aer Lingus

Fri, Oct 23 - Fri, Oct 30

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

13h 10m1 stop Reykjavik Keflavik Intl

11:55 am - 7:30 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

11h 35m1 stop Reykjavik Keflavik Intl

$642Icelandair

Mon, Oct 26 - Fri, Oct 30

8:40 pm - 10:55 amIAD Washington, D.C. Dulles Intl-LGW London Gatwick

10h 15m1 stop Reykjavik Keflavik Intl

11:55 am - 7:30 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

11h 35m1 stop Reykjavik Keflavik Intl

$642Icelandair

Wed, Nov 25 - Mon, Nov 30

9:00 pm - 11:25 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

9h 25m1 stop Dublin

12:10 pm - 7:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 20m1 stop Dublin

$772Aer Lingus

Recent last minute flight deals from District of Columbia to London

Wed, Aug 12 - Mon, Aug 31

11:11 am - 10:00 amIAD Washington, D.C. Dulles Intl-LGW London Gatwick

17h 49m1 stop Orlando

2:00 pm - 10:07 amLGW London Gatwick-IAD Washington, D.C. Dulles Intl

25h 07m1 stop Orlando

$696Multiple Airlines

Fri, Aug 14 - Wed, Sep 2

7:18 pm - 10:00 amIAD Washington, D.C. Dulles Intl-LGW London Gatwick

33h 42m1 stop Orlando

2:00 pm - 4:07 pmLGW London Gatwick-IAD Washington, D.C. Dulles Intl

31h 07m1 stop Orlando

$719Multiple Airlines

Tue, Aug 11 - Tue, Sep 1

10:35 pm - 10:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 25m1 stop Lisbon Humberto Delgado

7:50 pm - 3:10 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

24h 20m1 stop Lisbon Humberto Delgado

$780TAP AIR PORTUGAL

Fri, Aug 14 - Wed, Sep 2

10:50 pm - 6:50 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 00m1 stop Lisbon Humberto Delgado

6:00 am - 3:10 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 10m1 stop Lisbon Humberto Delgado

$827TAP AIR PORTUGAL

Sat, Aug 15 - Sat, Aug 29

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

15h 05m2 stops Kastrup Copenhagen Oslo Gardermoen

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

15h 20m1 stop Kastrup Copenhagen

$855Scandinavian Airlines

Sat, Aug 15 - Sat, Aug 29

8:20 pm - 6:50 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

17h 30m2 stops Kastrup Copenhagen Oslo Gardermoen

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

15h 20m1 stop Kastrup Copenhagen

$864Scandinavian Airlines

Tue, Aug 11 - Tue, Aug 18

8:25 pm - 2:55 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 30m1 stop Madrid Barajas

11:30 am - 6:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 20m1 stop Madrid Barajas

$869Iberia

Wed, Aug 12 - Wed, Aug 19

6:10 am - 8:45 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 35m1 stop New York John F Kennedy Intl

11:55 am - 10:59 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

16h 04m1 stop New York John F Kennedy Intl

$886JetBlue

Wed, Aug 12 - Sat, Aug 29

6:10 am - 8:45 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 35m1 stop New York John F Kennedy Intl

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

19h 44m1 stop New York John F Kennedy Intl

$916JetBlue

Wed, Aug 12 - Wed, Aug 26

5:00 pm - 9:30 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

11h 30m1 stop Madrid Barajas

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

14h 15m1 stop Madrid Barajas

$942Iberia

Recent direct flight deals from District of Columbia to London

Wed, Dec 9 - Tue, Dec 15

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

$706British Airways

Sun, Dec 6 - Sun, Dec 13

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

$750British Airways

Fri, Nov 6 - Fri, Nov 13

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

7h 25mnonstop

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

8h 30mnonstop

$796Multiple Airlines

Wed, Dec 9 - Tue, Dec 15

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

$802Multiple Airlines

Mon, Sep 21 - Tue, Sep 29

10:25 pm - 10:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mnonstop

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

8h 15mnonstop

$803Iberia

Mon, Sep 21 - Tue, Sep 29

5:45 pm - 6:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mnonstop

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

8h 15mnonstop

$834Finnair

Mon, Sep 21 - Tue, Sep 29

10:05 pm - 10:40 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mnonstop

3:50 pm - 7:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$835Virgin Atlantic

Mon, Sep 21 - Tue, Sep 29

10:25 pm - 10:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mnonstop

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

8h 15mnonstop

$842Finnair

Wed, Oct 7 - Wed, Oct 14

10:05 pm - 10:40 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mnonstop

3:50 pm - 7:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$850Virgin Atlantic

Sun, Nov 1 - Fri, Nov 13

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

$854Iberia

Useful Info

Low season	February
High season	December
Cheapest flight	$272

Best time to beat the crowds with an average 23% drop in price.

Most popular time to fly with an average 21% increase in price.

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.

Everything you need to know for your flight to London

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Complete your trip

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Return flight deals

Cabin class types available on flights to District of Columbia

First Class flights to Londonfrom $5,566

Business Class flights to Londonfrom $3,702

Premium Economy Class flights to Londonfrom $1,568

Economy Class flights to Londonfrom $791

$272 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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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

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