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IAD - LHR

C$ 341 Find cheap flights from Washington, D.C. to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Heathrow departing on 23/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
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Search hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to London, as well as popular online travel agencies
In the last 7 days, travellers have searched 46,397,547 times on KAYAK, and here is why:

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Cheap flight deals from Washington, D.C. to London Heathrow Airport (IAD-LHR)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to London Heathrow Airport 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 and deals for you by selecting your travel dates.
Choose your dates
10:30 p.m. - 5:30 p.m.IAD-LHR
14h 00m1 stop
6:00 a.m. - 4:00 p.m.LHR-IAD
14h 00m1 stop
C$ 702TAP AIR PORTUGAL
Find Deal
Fri, 28 Feb - Thu, 13 Mar
7:40 p.m. - 10:50 a.m.IAD-LHR
10h 10m1 stop
12:15 p.m. - 6:20 p.m.LHR-IAD
11h 05m1 stop
C$ 706Icelandair
Find Deal
Sat, 9 Nov - Sat, 7 Dec
5:10 p.m. - 8:55 a.m.IAD-LHR
34h 45m2 stops
6:40 a.m. - 3:40 p.m.LHR-IAD
14h 00m1 stop
C$ 731Scandinavian Airlines
Find Deal
Fri, 14 Feb - Mon, 17 Feb
9:55 p.m. - 10:05 a.m.IAD-LHR
7h 10mdirect
6:25 a.m. - 5:20 p.m.LHR-IAD
14h 55m1 stop
C$ 751
Find Deal
Mon, 24 Feb - Fri, 14 Mar
5:10 p.m. - 4:00 p.m.IAD-LHR
17h 50m1 stop
6:40 p.m. - 3:40 p.m.LHR-IAD
26h 00m1 stop
C$ 756Scandinavian Airlines
Find Deal
Mon, 11 Nov - Tue, 26 Nov
10:15 p.m. - 10:30 a.m.IAD-LHR
7h 15mdirect
8:40 a.m. - 3:25 p.m.LHR-IAD
11h 45m1 stop
C$ 759Delta
Find Deal
Sun, 22 Sep - Thu, 10 Oct
10:15 p.m. - 10:30 a.m.IAD-LHR
7h 15mdirect
6:30 a.m. - 3:35 p.m.LHR-IAD
14h 05m1 stop
C$ 760Delta
Find Deal
Sun, 22 Sep - Tue, 1 Oct
5:06 p.m. - 8:05 a.m.IAD-LHR
9h 59m1 stop
8:40 a.m. - 3:35 p.m.LHR-IAD
11h 55m1 stop
C$ 765KLM
Find Deal
Wed, 25 Sep - Tue, 1 Oct
10:25 p.m. - 10:40 a.m.IAD-LHR
7h 15mdirect
6:00 a.m. - 5:35 p.m.LHR-IAD
15h 35m1 stop
C$ 789
Find Deal
Fri, 25 Oct - Sun, 27 Oct
5:06 p.m. - 8:05 a.m.IAD-LHR
9h 59m1 stop
8:40 a.m. - 3:25 p.m.LHR-IAD
11h 45m1 stop
C$ 832KLM
Find Deal
Fri, 20 Sep - Fri, 27 Sep

Flights from Washington, D.C. to Heathrow - Travel Insights & Trends

Get data-powered insights and trends into flights from Washington, D.C. to Heathrow to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport is October, where tickets cost C$ 882 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is C$ 1,455 and C$ 1,227 respectively.

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

The average price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.
Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 1,165 on average

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 113 days before departure.

Good to know

Low season

January

High season

September

Cheapest flight

C$ 341
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly and prices are also 14% lower on average.
Flight from Washington, D.C. to London Heathrow Airport

When to book flights from Washington, D.C. to Heathrow

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington, D.C. to London Heathrow Airport flights

  • What accessibility services are there at Dulles Intl Airport?

    To cater to travelers with limited mobility and disabilities, Dulles Airport offers a wide range of accessibility services. These include elevators with Braille signage and self-voicing announcements, wheelchair access, a pet relief area for service or companion dogs, public restrooms with disability access, and assisted security screenings.

  • Are there nonstop flights from Dulles Intl to London-Heathrow Airport?

    Passengers wishing to fly from Washington, DC, to London can get nonstop flights from several airlines, including Lufthansa. Other nonstop flights are operated by multiple airlines, although the tickets come at a higher price. Most flights operated by American Airlines, Finnair, Icelandair, Delta Air Lines, and Virgin Atlantic have one- or two-stop flights. Depending on the airline, you may board your connecting flight in Keflavik, Dallas, Chicago, Helsinki, Boston, or Atlanta.

  • Are there airport hotels at London-Heathrow Airport?

    There are hotels located right within Heathrow Airport. They include the Hilton Garden Inn Airport Hotel, situated right next to Terminal 2 and a few minutes walk to Terminal 3. Alternatively, you can choose to stay at the Aerotel London Heathrow situated near Terminal 2 and 3. Other hotels within a comfortable walking distance include the Novotel London Heathrow Airport T1 T2 and T3, Ibis Styles London Heathrow Airport, Radisson Blu Edwardian Heathrow Hotel, and more.

  • How can I get from Heathrow Airport to the London city center?

    You can get from London-Heathrow Airport to the city center by train. You can board a train from Heathrow Central Station, located about 5min from terminals 2 and 3. You can get train tickets at the automated ticketing machines or booking office at the station. Trains from the airport arrive in the downtown area at Paddington Station after about 15min.

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport was C$ 252 for a one-way ticket and C$ 519 for a round-trip.

  • Which airports will I be using when flying from Washington, D.C. to London Heathrow Airport?

    On your way to London Heathrow Airport, you’ll fly out from Washington, D.C. Dulles Intl. You’ll be landing at London Heathrow.

  • Which airlines offer Wi-Fi service onboard planes from Washington, D.C. to London Heathrow Airport?

    Only Lufthansa offers inflight Wi-Fi service on the Washington, D.C. to London Heathrow Airport flight route.

  • Which aircraft models fly most regularly from Washington, D.C. to London Heathrow Airport?

    The Boeing 777 is the aircraft model that flies most regularly on the Washington, D.C. to London Heathrow Airport flight route.

  • Which airline alliances offer flights from Washington, D.C. to London Heathrow Airport?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Washington, D.C. and London Heathrow Airport, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Washington, D.C. to London Heathrow Airport?

    There are direct flights from Washington, D.C. to London Heathrow Airport on a daily basis.

  • How does KAYAK find such low prices on flights from Washington, D.C. to London Heathrow Airport?

    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 Washington, D.C. to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Washington, D.C. is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to London Heathrow Airport?

    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 Heathrow Airport with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to London Heathrow Airport?

    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 Heathrow Airport from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 1,247 or less round-trip.
  • You can get to Dulles International Airport (IAD) from downtown Washington, DC, by car, bus, or train. If you require quick access to the airport, we recommend taking the train. A train ticket goes for about $11 and is a great way to avoid traffic.
  • Do you have a flight departure and want to return your rental car to one of the rental car companies at Dulles Intl Airport (IAD)? Follow the "Rental Car Return" signs at the airport, which lead to Autopilot Dr. Here, you'll find the rental car parking lots. Your rental company's shuttle bus should take you to the terminal.
  • If you feel like relaxing after touching down in London, you can access VIP services from one of the Heathrow (LHR) lounges. They include the Plaza Premium Lounge in Terminal 4, which charges around £27.45 ($38), the Club Aspire Lounge in Terminal 3, which charges approximately £27.45 ($38), and the Sky Team Lounge in Terminal 4, which charges around £31.39 ($43.50).
  • Pet lovers can travel with their pets from Washington, DC. The airport has pet relief areas outside the terminal building, right after security, and another one inside the concourses. If you plan to travel with your pet in the cabin or send him as baggage, we recommend that you contact your airline in advance.
  • Washington, DC/London air route is popular among business travelers. London Heathrow Airport is located about 14 miles from London city, offering easy access to business-centric points of interest like the Royal Horticultural Halls and the Excel Business Expo Center.
See more tips

Flights from Washington, D.C. to Heathrow: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Washington, D.C. to Heathrow 
CraigFlew with United AirlinesJun 2024
Get to beginning of boarding group early. Bring as little on board as possible due to small overhead bin space.
SaraFlew with British AirwaysJul 2024
British Airways baggage policy was on top. Boarding was well organized and food was pretty good.
MaureenFlew with IberiaAug 2024
British Airways offered an excellent service . Thank you !

Prefer to fly non-stop from Washington, D.C. to London Heathrow Airport?

Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, which days they fly and book direct flights.

Nonstop departures

Washington, D.C. Dulles Intl to London Heathrow

Monday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Tuesday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Wednesday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Thursday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Friday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Saturday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Sunday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

See more nonstop flights

Nonstop returns

London Heathrow to Washington, D.C. Dulles Intl

Monday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Tuesday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Wednesday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Thursday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Friday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Saturday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

Sunday

Aer Lingus,Air Canada,Air France, +13 more

Aer Lingus,Air Canada, +14 more

See more nonstop flights
See more nonstop flights

Book cheap flights from Washington, D.C. to London

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to London found on KAYAK in the last 72 hours.
23/9Mon
1 stopIcelandair
10h 25mIAD-LHR
C$ 341
4/3Tue
1 stopTAP AIR PORTUGAL
14h 10mIAD-LHR
C$ 438
1/1Wed
1 stopTAP AIR PORTUGAL
15h 25mIAD-LHR
C$ 441
24/11Sun
directBritish Airways
7h 15mIAD-LHR
C$ 513
23/10Wed
2 stopsUnited Airlines
16h 24mIAD-LHR
C$ 518
23/11Sat
1 stopUnited Airlines
31h 59mIAD-LHR
C$ 536
30/9Mon
2 stopsSWISS
35h 55mIAD-LHR
C$ 579
19/9Thu
directDelta
7h 15mIAD-LHR
C$ 581
11/9Wed
directDelta
7h 15mIAD-LHR
C$ 628
28/9Sat
1 stopBritish Airways
9h 50mIAD-LHR
C$ 720

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Last minute flights from Washington, D.C. to Heathrow

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Washington, D.C. to London that are departing in the next 10 days.
8/9Sun
multi-stopScandinavian Airlines
19h 25mIAD-LHR
21/9Sat
multi-stopScandinavian Airlines
13h 45mLHR-IAD
C$ 892
9/9Mon
multi-stopScandinavian Airlines
18h 10mIAD-LHR
19/9Thu
multi-stopScandinavian Airlines
23h 55mLHR-IAD
C$ 897
10/9Tue
directUnited Airlines
7h 15mIAD-LHR
25/9Wed
multi-stopUnited Airlines
12h 35mLHR-IAD
C$ 1,179
10/9Tue
directBritish Airways
7h 20mIAD-LHR
25/9Wed
directBritish Airways
8h 05mLHR-IAD
C$ 1,200
10/9Tue
directLufthansa
7h 15mIAD-LHR
10/10Thu
directLufthansa
8h 15mLHR-IAD
C$ 1,202
10/9Tue
directLufthansa
7h 15mIAD-LHR
17/9Tue
multi-stopLufthansa
11h 35mLHR-IAD
C$ 1,206
7/9Sat
multi-stopUnited Airlines
26h 45mIAD-LHR
24/9Tue
multi-stopUnited Airlines
14h 33mLHR-IAD
C$ 1,218
7/9Sat
multi-stopDelta
22h 07mIAD-LHR
20/9Fri
directDelta
7h 55mLHR-IAD
C$ 1,222
10/9Tue
directDelta
7h 15mIAD-LHR
21/9Sat
directDelta
7h 55mLHR-IAD
C$ 1,268
10/9Tue
directBritish Airways
7h 20mIAD-LHR
22/9Sun
multi-stopBritish Airways
10h 45mLHR-IAD
C$ 12,599

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Everything you need to know for your flight from Washington, D.C. to Heathrow

Information on your arrival and departure airports