LON - WAS

$317 Find Cheap Flights from London to Washington, D.C. - Compare and Save

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Everything you should know

Cheapest round-trip
$572
Typical prices: $628-$854
Iberia
Fri 3/2Fri 3/9
LHR - IAD • 1 stop
Cheapest non-stop
$574
Typical prices: $644-$866
Finnair, Iberia
Tue 3/6Wed 3/14
LHR - IAD • Non-stop
Nonstop flights
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
Cheapest • 25% average savings
Most popular
Insights
Insights
Avoid delays
Most punctual • 90% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 22 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 15% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $594 (round-trip)
Shortest trip • 10h 29m (one-way)
Insights
Insights
Start a new search
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We hope you love your trip to Washington, D.C.!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from London to Washington, D.C. (LON-WAS)

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

Recent round-trip flight deals from London to Washington, D.C.

Thu, Oct 1 - Mon, Oct 5
Virgin Atlantic Logo
3:50 pm - 7:15 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
8h 25mnonstop
Virgin Atlantic Logo
10:05 pm - 10:40 amIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 35mnonstop
$571Virgin Atlantic
Thu, Oct 1 - Sun, Oct 4
Virgin Atlantic Logo
3:50 pm - 7:15 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
8h 25mnonstop
Virgin Atlantic Logo
10:05 pm - 10:40 amIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 35mnonstop
$571Virgin Atlantic
Wed, Dec 23 - Mon, Dec 28
Iberia Logo
10:45 am - 4:20 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
34h 35m1 stop Madrid Barajas
Iberia Logo
6:05 pm - 6:15 amIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 10mnonstop
$571Iberia
Tue, Mar 2 - Tue, Mar 9
Iberia Logo
7:30 am - 4:20 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
13h 50m1 stop Madrid Barajas
Iberia Logo
6:05 pm - 6:15 amIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
7h 10mnonstop
$572Iberia
Wed, Dec 16 - Mon, Dec 28
British Airways Logo
7:35 am - 4:20 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
13h 45m1 stop Madrid Barajas
British Airways Logo
5:50 pm - 10:35 amIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
11h 45m1 stop Madrid Barajas
$575British Airways
Wed, Dec 16 - Tue, Dec 29
British Airways Logo
7:35 am - 4:20 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
13h 45m1 stop Madrid Barajas
British Airways Logo
5:50 pm - 10:35 amIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
11h 45m1 stop Madrid Barajas
$575British Airways
Tue, Oct 13 - Thu, Oct 29
Delta Logo
6:15 am - 4:37 pmLHR  London Heathrow-DCA Washington, D.C. Reagan-National
15h 22m2 stops Paris Charles de Gaulle New York John F Kennedy Intl
Delta Logo
12:27 pm - 7:45 amDCA  Washington, D.C. Reagan-National-LHR London Heathrow
15h 18m1 stop Detroit Metropolitan Wayne County
$576Delta
Sat, Oct 3 - Sun, Oct 4
Delta Logo
8:55 am - 4:05 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
12h 10m1 stop Paris Charles de Gaulle
Delta Logo
6:47 pm - 1:05 pmIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
13h 18m1 stop Minneapolis St Paul
$576Delta
Tue, Oct 20 - Mon, Oct 26
American Airlines Logo
11:30 am - 6:50 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
12h 20m1 stop Madrid Barajas
American Airlines Logo
7:15 pm - 9:40 amIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
10h 25m1 stop Charlotte Douglas
$584American Airlines
Thu, Oct 15 - Mon, Oct 19
American Airlines Logo
11:30 am - 7:00 pmLHR  London Heathrow-IAD Washington, D.C. Dulles Intl
12h 30m1 stop Madrid Barajas
American Airlines Logo
1:23 pm - 9:10 amIAD  Washington, D.C. Dulles Intl-LHR London Heathrow
14h 47m2 stops Charlotte Douglas New York John F Kennedy Intl
$585American Airlines
Booking Insights

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

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

How much is a round-trip flight from London to Washington, D.C.?

Round-trip flights from London to Washington, D.C. start at $572. Prices are below average for this route right now, with typical round-trip fares ranging from $628 to $854. The lowest price found in the past 5 days was $572 on Iberia.

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

London Gatwick Airport (LGW) to Washington, D.C. Dulles Intl Airport (IAD) is the cheapest London to Washington, D.C. route, averaging $562 round-trip. Other London to Washington, D.C. routes average $771, based on KAYAK data over the past 12 months.

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

Thursday is the cheapest day of the week to fly from London to Washington, D.C., it is 4% cheaper than the average day. Sunday is the most expensive day with flight prices 6% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • February is the cheapest month to fly from London to Washington, D.C. at $624 round-trip.
  • June ($767) and May ($763) 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 to Washington, D.C. the cheapest?

Flights from London to Washington, D.C. are cheapest 22 weeks before departure. Booking in this window typically costs about 29% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

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

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

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Duncan Madden

Duncan Madden

Expert on British Airways and LHR

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.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines, Delta 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 on the sea, likely en route to Antarctica or the Arctic.

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.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

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

Low season

February

Cheapest flight

$317
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from London Heathrow Airport to Baltimore

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

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

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

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

  • How do I travel to London airports?

    For those departing from Heathrow Airport, you can catch the Heathrow Express train from central London. This will take you only 15min. Alternatively, the Piccadilly Line on the Underground stops outside Terminals 2 & 3, Terminal 4 and Terminal 5. The Gatwick Express can take you to Gatwick Airport in 30min from Victoria Station, and those departing from Stansted Airport, can catch the Stansted Express from Tottenham Hale or Liverpool Street stations.

  • How do I travel from Washington Airport into the city?

    The Washington DC Metrorail Train System is connected to Reagan Airport with a station located on the concourse between Terminals B and C. Farecards can be found at all entrances to the station. On the other hand, the Dulles Airport is not directly connected to the Metrorail system, however the Silver Line Express bus service can connect you to the closest station, the Wiehle-Reston East Metro Station, for around $5 (£3.80).

  • Are there any passenger lounges in London airports?

    If you’d like to wait for your flight from London to Washington in comfort, you can find passenger lounges throughout Heathrow Airport. Plaza Premium Lounges are located at Terminal 2A, Terminal 3 ground floor, Terminal 4 near Gate 1 and at Terminal 5 next to Gate A7. These lounges can be accessed for £40 at the door. The Aspire Lounge & Spa at Terminal 5 has the added luxury of spa facilities and can be accessed for £35.

  • Are there any hotels near Washington Airport?

    For those flying into Dulles Airport, you can find Washing Dulles Airport Marriott on the airport campus, within a 3min drive of the terminal. This hotel also offers an airport shuttle for added convenience. The Westin and Hyatt Regency Dulles are also within a 5min drive. 5min from Ronald Reagan Airport is Crystal City, which has a range of accommodation options, including the International Luxury Suites, the Hilton Garden Inn and the Crystal City Marriott.

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

    Among airlines operating London 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.

  • What airlines are available from London to Washington, D.C.?

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

    • British Airways
    • United Airlines
    • Virgin Atlantic

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

    Flights from London to Washington, D.C. may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN), with arrivals available at Washington, D.C. area airports such as Washington, D.C. Reagan-National (DCA) and Washington, D.C. Dulles Intl (IAD).

  • Which airlines include bags at no extra cost on London 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 travelers should check the fare details before booking.

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

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

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

    Prices vary by airline.

  • How much can I save by taking a layover when flying from London to Washington, D.C.?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $594 round-trip via Vienna Intl (VIE), compared to $741 for nonstop.

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

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $51–$100 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 to Washington, D.C. pass through?

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

    • Dublin (DUB) - 35% of one-stop connections
    • Reykjavik Keflavik Intl (KEF) - 32% of one-stop connections
    • Boston Logan Intl (BOS) - 7% 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 to Washington, D.C.?

    Yes. Being flexible with your travel dates can save you up to 10% on the London to Washington, D.C. route. Thursday is the cheapest departure day at $707 round-trip on average, while Sunday is the most expensive at $778, a difference of $71. 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 from London 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 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 to Washington, D.C. spread across the day?

    Afternoon is the busiest departure period on London to Washington, D.C. flights, with 83% of flights 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 Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. on KAYAK.

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

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

    • Earliest: departs at 10:50 am and lands at 7:19 pm
    • Latest: departs at 5:05 pm and lands at 1:34 am.

    The flight takes about 8h 29m.

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

    Last-minute fares on this route - booked within 2 weeks of departure - run 17% above the route average of $730. Book 22 weeks before departure for the lowest fares.

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

    A nonstop flight from London to Washington, D.C. takes 8h 29m, covering 3,662 miles.

  • Do I need a passport to fly from London 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 to Washington, D.C. looking right now?

    One-way fares from London to Washington, D.C. are currently lower than usual. Average one-way flight prices are about $410, which is 44% below the typical average for this route.

  • How does United Airlines’s on-time performance compare to other airlines on London 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 to Washington, D.C. flights are:

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

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

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

    Flying via Philadelphia (PHL) gives the shortest average 1-stop total travel time at 10h 29m, compared with 10h 49m via Newark (EWR) and 10h 55m via Dublin (DUB).

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

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

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

    Since Washington, D.C. is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near Washington, D.C. Reagan-National Airport (DCA) — daily rates from around $23:

    · Sixt
    · Dollar
    · Thrifty
    · Alamo
    · Budget

    Near Washington, D.C. Dulles Intl Airport (IAD) — daily rates from around $24:

    · Dollar
    · Budget
    · Hertz
    · Sixt
    · Thrifty

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

    Round-trip flights from London to Washington, D.C. range from $628 to $854, with an average of $730 over the past 12 months. Anything below $628 counts as a good deal.

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

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

    • • KLM
    • • Delta

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

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

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Thursday departure instead of Sunday. On this route, Thursday flights average $707 - about $71 less than Sunday (9% 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 29% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your London to Washington, D.C. trip for February. Fares historically average $624 round-trip in that month - typically $143 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 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 hours 17 minutes, so choosing a carrier with strong on-time performance can make a difference on tight schedules.
  • If you have the time, taking a 1-stop flight through Vienna Intl Airport (VIE) can be cheaper than flying direct. The cheapest layover option averages $594 round-trip on this route - about $147 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
  • When booking your flights from London to Washington, you can choose to fly into either Washington Dulles International Airport (IAD) or Ronald Reagan Washington National Airport (DCA). Dulles Airport is larger, however Reagan Airport is only 15min from downtown Washington.
  • If you wish to purchase United States Dollars before your flight from London to Washington, you can order your foreign currency online on the Heathrow Airport website and pick it up when you arrive at the airport. Collections can be made at the Travelex counters, found at all terminals before security.
  • For those feeling lost at Dulles Airport, you can find an information desk near Baggage Claims 6, 11 and 14. Alternatively, keep an eye out for the Airport Ambassadors in their yellow shirts, volunteers who can help provide advice on airport services.
  • Those bringing their own car to Gatwick Airport (LGW) can find budget-friendly long stay parking available at the designated car park, starting at £22. You can then catch the free shuttle bus to either the South or North Terminal.
  • If you are looking for a bite to eat after your flight from London to Washington, you can find a number of options in the public area of the Reagan Airport, known as the National Hall. Before security, you can find a 24-hour Dunkin’ Donuts or Starbucks if you’re looking for a coffee.

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

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

Direct departures

London 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

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 London to Washington, D.C.

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