LHR - WAS

£287 Find Cheap Flights from London Heathrow Airport to Washington, D.C. – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£417
Typical prices: £470-£632
Virgin Atlantic
Mon 15/10Thu 18/10
LHR - IAD • 1 stop
Cheapest direct flights
£418
Typical prices: £475-£639
Virgin Atlantic
Sun 7/10Sun 14/10
LHR - IAD • Direct
Direct flights
Every day
You can fly direct with British Airways, United Airlines, and Virgin Atlantic. Average duration is 8h 29m
Direct flights
+1
Direct flights
+1
Top routes
LHR - DCA
Cheapest • 1% average savings
LHR - IAD
Most popular
Insights
Insights
Avoid delays
United Airlines
Most punctual • 90% on-time
Afternoon
Best time • Fewest delays
Insights
Insights
When to book
22 weeks
in advance
Our data shows that travellers who book at least 22 weeks in advance save around 28% compared to booking last minute.
Insights
Insights
When to travel
February
Cheapest • 14% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Reykjavik Keflavik Intl (KEF)
Cheapest • Avg £435 (return)
Philadelphia (PHL)
Shortest trip • 10h 29m (one-way)
Insights
Insights
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We hope you enjoy your trip to Washington, D.C.!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Heathrow to Washington, D.C. (LHR-WAS)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Washington, D.C.

Tue, 29 Sep - Fri, 6 Nov
British Airways Logo
11:30 - 18:50LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
12h 20m1 stop Madrid Barajas
British Airways Logo
20:07 - 12:00IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
10h 53m1 stop Charlotte Douglas
£418British Airways
Wed, 7 Oct - Wed, 14 Oct
Virgin Atlantic Logo
15:50 - 19:15LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
8h 25mdirect
Virgin Atlantic Logo
22:05 - 10:40IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 35mdirect
£418Virgin Atlantic
Wed, 21 Oct - Tue, 27 Oct
Icelandair Logo
21:25 - 19:20LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
26h 55m1 stop Reykjavik Keflavik Intl
Icelandair Logo
20:40 - 19:30IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
18h 50m1 stop Reykjavik Keflavik Intl
£419Icelandair
Wed, 30 Sep - Wed, 7 Oct
Iberia Logo
06:15 - 15:30LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
14h 15m1 stop Madrid Barajas
Iberia Logo
19:13 - 14:25IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
14h 12m1 stop Dallas/Fort Worth
£419Iberia
Wed, 7 Oct - Wed, 14 Oct
Iberia Logo
06:15 - 15:30LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
14h 15m1 stop Madrid Barajas
Iberia Logo
19:13 - 14:25IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
14h 12m1 stop Dallas/Fort Worth
£419Iberia
Wed, 7 Oct - Wed, 14 Oct
Virgin Atlantic Logo
15:50 - 19:15LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
8h 25mdirect
Virgin Atlantic Logo
22:05 - 10:40IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 35mdirect
£419Virgin Atlantic
Fri, 25 Dec - Thu, 28 Jan
Delta Logo
06:30 - 16:39LHR  London Heathrow-DCA Washington, D.C. Reagan-National
15h 09m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
Delta Logo
15:55 - 09:00DCA  Washington, D.C. Reagan-National-LHR London Heathrow
12h 05m1 stop Atlanta Hartsfield-Jackson
£420Delta
Thu, 1 Oct - Mon, 5 Oct
Delta Logo
06:30 - 15:35LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
14h 05m1 stop Amsterdam Schiphol
Delta Logo
11:44 - 13:05IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
20h 21m1 stop Minneapolis St Paul
£420Delta
Thu, 4 Feb - Wed, 10 Feb
British Airways Logo
16:30 - 23:59LHR  London Heathrow-DCA Washington, D.C. Reagan-National
12h 29m1 stop Chicago O'Hare Intl
British Airways Logo
17:21 - 07:50DCA  Washington, D.C. Reagan-National-LHR London Heathrow
9h 29m1 stop Philadelphia
£423British Airways
Thu, 15 Oct - Fri, 30 Oct
Icelandair Logo
21:25 - 19:20LHR  London Heathrow-IAD Washington, D.C. Dulles Intl
26h 55m1 stop Reykjavik Keflavik Intl
Icelandair Logo
20:40 - 10:50IAD  Washington, D.C. Dulles Intl-LHR London Heathrow
10h 10m1 stop Reykjavik Keflavik Intl
£425Icelandair
Booking Insights

Price, demand, and travel trends for London Heathrow Airport to Washington, D.C. flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from London Heathrow Airport to Washington, D.C. with more confidence.

How much is a return flight from London Heathrow Airport to Washington, D.C.?

Return flights from London Heathrow Airport to Washington, D.C. start at £417. Prices are below average for this route right now, with typical return fares ranging from £470 to £632. The lowest price found in the past 5 days was £417 on Virgin Atlantic.

What is the cheapest London Heathrow Airport to Washington, D.C. flight route?

There's little price difference between London Heathrow Airport to Washington, D.C. routes. They average around £535 return, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from London Heathrow Airport to Washington, D.C.?

Thursday is the cheapest day of the week to fly from London Heathrow Airport to Washington, D.C. and is 3% cheaper than the average day. Sunday is the most expensive day with flight prices 5% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • February is the cheapest month to fly from London Heathrow Airport to Washington, D.C. at £463 return.
  • June (£569) and May (£565) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 22% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from London Heathrow Airport to Washington, D.C. the cheapest?

Flights from London Heathrow Airport to Washington, D.C. are cheapest 22 weeks before departure. Booking in this window typically costs about 28% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals
Expert advice

Expert advice for your flight from Heathrow to Washington, D.C.

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Laura Ratliff

Laura Ratliff

Expert on Virgin Atlantic

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

Read more
Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has travelled to more than 50 countries across six continents.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or out at sea, likely en route to Antarctica or the Arctic.

Read more
Tara Craig

Tara Craig

Expert on Austrian Airlines

Tara Craig has been a journalist for 17 years, focusing on aviation for more than a decade. She has covered everything from how airports accommodate disabled passengers to the emergence of electric air taxis. Tara is constantly travelling and finds it hard to stop noticing things – good and bad – about the air travel experience.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Kirstie Pickering

Kirstie Pickering

Expert on LHR

Aviation and business journalist Kirstie didn’t leave England until she was 18 years old, but has since travelled to over 20 countries including Japan, Canada, and Iceland. Her travel expertise lies in European city breaks, including how to find the best locally-owned hotels and restaurants and how to optimise the airport experience for your needs.

Read more

Key details for London Heathrow Airport to Washington, D.C. flights

Low season

February

Cheapest flight

£281
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (4% more expensive on average)
Flights from London Heathrow Airport to Baltimore

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

Are your dates flexible? Find out the best times to travel from Heathrow to Washington, D.C. based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your London Heathrow Airport to Washington, D.C. flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airlines offer extra legroom and free seat selection on London Heathrow Airport to Washington, D.C. flights?

    Among airlines operating London Heathrow Airport to Washington, D.C. flights:

    • British Airways: offers extra legroom; offers free seat selection
    • United Airlines: offers extra legroom; offers free seat selection
    • Virgin Atlantic: offers extra legroom; offers free seat selection
    • Air France: offers extra legroom; offers free seat selection
    • American Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines are available on the route from London Heathrow Airport to Washington, D.C.?

    3 airlines operate flights between London Heathrow Airport and Washington, D.C.. The airlines offering direct flights on this route include:

    • British Airways
    • United Airlines
    • Virgin Atlantic

  • Which airports can I use when flying from London Heathrow Airport to Washington, D.C.?

    Flights from London Heathrow Airport to Washington, D.C. usually depart from London Heathrow (LHR) and may arrive at several airports in Washington, D.C. area, including Washington, D.C. Reagan-National (DCA) and Washington, D.C. Dulles Intl (IAD).

  • Which airlines include bags at no extra cost on London Heathrow Airport to Washington, D.C. flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Lufthansa: a cabin bag and a checked bag in Economy class
    • British Airways: a cabin bag and a checked bag in Economy class
    • Austrian Airlines: a cabin bag and a checked bag in Economy class

    Bag allowance can vary by ticket type, cabin class, route, and airline, so travellers should check the fare details before booking.

  • Which cabin classes can I book on flights from London Heathrow Airport to Washington, D.C.?

    Four cabin classes are available on flights from London Heathrow Airport to Washington, D.C.:

    • Economy class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • How much can I save by having a stopover when flying from London Heathrow Airport to Washington, D.C.?

    On this route, stopover flights are cheaper than direct options on average. Stopover fares average £435 return via Reykjavik Keflavik Intl (KEF), compared with £547 for direct.

  • What is the standard checked bag allowance on flights from London Heathrow Airport to Washington, D.C.?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £38–£74 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which airports do connecting flights from London Heathrow Airport to Washington, D.C. pass through?

    One-stop flights from London Heathrow Airport to Washington, D.C. most commonly connect through:

    • Dublin (DUB) – 44% of one-stop connections
    • Reykjavik Keflavik Intl (KEF) – 20% of one-stop connections
    • Boston Logan Intl (BOS) – 8% of one-stop connections
    • Lisbon Humberto Delgado (LIS) – 7% of one-stop connections

    Dublin (DUB) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from London Heathrow Airport to Washington, D.C.?

    Yes. Being flexible with your travel dates can save you up to 9% on the London Heathrow Airport to Washington, D.C. route. Thursday is the cheapest departure day at £528 return on average, while Sunday is the most expensive at £574, a difference of £46. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • At what point is a flight considered delayed on the route from London Heathrow Airport to Washington, D.C.?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the London Heathrow Airport to Washington, D.C. route, 16% of flights were delayed in the past 3 months, with delays averaging 2 hours 17 minutes.

  • How are flight departures from London Heathrow Airport to Washington, D.C. spread across the day?

    Afternoon is the busiest departure period on London Heathrow Airport to Washington, D.C. flights, with 83% leaving in that window. Evening departures account for 16%, Morning flights for 1%, and Night flights for 0%.

  • What popular places can I visit in Washington, D.C.?

    Some of the most popular sights in Washington, D.C. are Union Station, Capital One Arena, and Charles Sumner School Museum and Archives. These are among the most viewed places in Washington, D.C. on KAYAK.

  • What are the earliest and latest flights from London Heathrow Airport to Washington, D.C.?

    These are the earliest and latest flight times available from London Heathrow Airport to Washington, D.C.:

    • Earliest: departs at 10:50 and lands at 19:19
    • Latest: departs at 17:05 and lands at 01:34.

    The flight takes about 8h 29m.

  • How expensive are last-minute London Heathrow Airport to Washington, D.C. flights?

    Last-minute fares on this route (booked within 2 weeks of departure) run 17% above the route average of £541. Book 22 weeks before departure for the lowest fares.

  • How long is a flight from London Heathrow Airport to Washington, D.C.?

    A direct flight from London Heathrow Airport to Washington, D.C. takes 8h 29m, covering 3,649 miles.

  • Do I need a passport to fly from London Heathrow Airport to Washington, D.C.?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from London Heathrow Airport to Washington, D.C. looking right now?

    One-way fares from London Heathrow Airport to Washington, D.C. are currently lower than usual. Average one-way flight prices are about £318, which is 42% below the typical average for this route.

  • How does United Airlines's on-time performance compare to other airlines on London Heathrow Airport to Washington, D.C. flights?

    United Airlines is slightly above the route average for timely arrivals, while Virgin Atlantic has a lower on-time arrival rate. On-time arrival rates on London Heathrow Airport to Washington, D.C. flights are:

    • United Airlines: 90% on time
    • Virgin Atlantic: 85% on time
    • British Airways: 79% on time

    On average, flights on this route are punctual 84% of the time.

  • How do delay rates compare for morning and evening flights from London Heathrow Airport to Washington, D.C.?

    Afternoon flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

  • How much time can I save by choosing a different stopover airport from London Heathrow Airport to Washington, D.C.?

    Flying via Philadelphia (PHL) gives the shortest average 1-stop total travel time of 10h 29m, compared to 10h 49m via Newark (EWR) and 10h 51m via Dublin (DUB).

  • What is the time difference between London Heathrow Airport and Washington, D.C.?

    Washington, D.C. is 5 hours behind London Heathrow Airport (Eastern Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car hire options are available in Washington, D.C.?

    Since Washington, D.C. is served by multiple airports, car hire options and rates can vary depending on which one you fly into.
    Near Washington, D.C. Reagan-National Airport (DCA) – daily rates from around £17:

    · Sixt
    · Dollar
    · Thrifty
    · Alamo
    · Budget

    Near Washington, D.C. Dulles Intl Airport (IAD) – daily rates from around £18:

    · Dollar
    · Budget
    · Hertz
    · Sixt
    · Thrifty

  • How much should I expect to pay for a London Heathrow Airport to Washington, D.C. flight?

    Return flights from London Heathrow Airport to Washington, D.C. range from £470 to £632, with an average of £541 over the past 12 months. Anything below £470 counts as a good deal.

  • Which airlines offer Wi-Fi on London Heathrow Airport to Washington, D.C. flights?

    Two airlines offer in-flight Wi-Fi on London Heathrow Airport to Washington, D.C. flights:

    • • KLM
    • • Delta

    Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty programme, while others are paid add-ons priced by flight length.

Your guide to booking London Heathrow Airport to Washington, D.C. flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure instead of Sunday. On this route, Thursday flights average £528 – about £46 less than Sunday (8% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 22 weeks before you fly. On this route, that window historically saves about 28% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your London Heathrow Airport to Washington, D.C. trip for February. Fares historically average £463 return in that month – typically £106 less than the most expensive month, which is June (based on the last 12 months).
  • If arriving on time is high on your priority list, United Airlines is the strongest pick on this route. 90% of United Airlines flights from London Heathrow Airport to Washington, D.C. arrived on time in the past 3 months, slightly above the route's average on-time arrival rate of 84%. When flights on this route do arrive late, the average delay is 2 hours17 minutes, so choosing an airline with strong on-time performance can make a difference on tight schedules.
  • If you have the time, taking a 1-stop flight through Reykjavik Keflavik Intl Airport (KEF) can be cheaper than flying direct. The cheapest stopover option averages £435 return on this route – about £111 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Washington, D.C. Reagan-National Airport.
    - Hyatt House Washington DC The Wharf
    - Intercontinental Hotels Washington D.C. - The Wharf By IHG
    - Canopy by Hilton Washington D.C - The Wharf

Prefer to fly direct from London Heathrow Airport to Washington, D.C.?

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

Direct departures

London Heathrow to Washington, D.C.

Monday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Tuesday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Wednesday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Thursday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Friday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Saturday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Sunday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

See more direct flights

Direct returns

Washington, D.C. to London Heathrow

Monday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Tuesday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Wednesday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Thursday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Friday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Saturday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Sunday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

See more direct flights

More options for your flight from Heathrow to Washington, D.C.

Complete your trip to Washington, D.C. with a hotel stay or car hire

Car hire in Washington, D.C.
Hotels in Washington, D.C.
Holidays in Washington, D.C.