Flights from London to Washington, D.C. available from GBP 365*

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Our best rates from London to Washington, D.C.

Displaying fares for October-2026
  • LON–IAD, 04 10 2026 – 26 10 2026: From GBP 770
    04

    Su

    OCT

  • LON–IAD, 05 10 2026 – 27 10 2026: From GBP 905
    05

    Mo

  • LON–IAD, 06 10 2026 – 26 10 2026: From GBP 580
    06

    Tu

  • LON–IAD, 07 10 2026 – 25 10 2026: From GBP 528
    07

    We

  • LON–IAD, 08 10 2026 – 25 10 2026: From GBP 524
    08

    Th

  • LON–IAD, 09 10 2026 – 26 10 2026: From GBP 554
    09

    Fr

  • LON–IAD, 10 10 2026 – 26 10 2026: From GBP 930
    10

    Sa

  • LON–IAD, 11 10 2026 – 25 10 2026: From GBP 1,053
    11

    Su

  • LON–IAD, 12 10 2026 – 25 10 2026: From GBP 900
    12

    Mo

  • LON–IAD, 13 10 2026 – 27 10 2026: From GBP 525
    13

    Tu

  • LON–IAD, 14 10 2026 – 26 10 2026: From GBP 554
    14

    We

  • LON–IAD, 15 10 2026 – 26 10 2026: From GBP 704
    15

    Th

  • LON–IAD, 16 10 2026 – 25 10 2026: From GBP 930
    16

    Fr

  • LON–IAD, 17 10 2026 – 03 11 2026: From GBP 775
    17

    Sa

  • LON–IAD, 18 10 2026 – 03 11 2026: From GBP 744
    18

    Su

  • LON–IAD, 19 10 2026 – 12 11 2026: From GBP 907
    19

    Mo

  • LON–IAD, 20 10 2026 – 05 11 2026: From GBP 375
    20

    Tu

  • LON–IAD, 21 10 2026 – 03 11 2026: From GBP 428
    21

    We

  • LON–IAD, 22 10 2026 – 05 11 2026: From GBP 527
    22

    Th

  • LON–IAD, 23 10 2026 – 25 10 2026: From GBP 929
    23

    Fr

  • LON–IAD, 24 10 2026 – 05 11 2026: From GBP 938
    24

    Sa

  • LON–IAD, 25 10 2026 – 07 11 2026: From GBP 908
    25

    Su

  • LON–IAD, 26 10 2026 – 24 11 2026: From GBP 437
    26

    Mo

  • LON–IAD, 27 10 2026 – 03 11 2026: From GBP 453
    27

    Tu

  • LON–IAD, 28 10 2026 – 05 11 2026: From GBP 383
    28

    We

  • LON–IAD, 29 10 2026 – 03 11 2026: From GBP 381
    29

    Th

  • LON–IAD, 30 10 2026 – 15 11 2026: From GBP 381
    30

    Fr

  • LON–IAD, 31 10 2026 – 08 11 2026: From GBP 456
    31

    Sa

  • LON–IAD, 01 11 2026 – 17 11 2026: From GBP 473
    01

    Su

    NOV

  • LON–IAD, 02 11 2026 – 05 11 2026: From GBP 471
    02

    Mo

  • LON–IAD, 03 11 2026 – 10 11 2026: From GBP 473
    03

    Tu

  • Fly in the next 3 months: flights from London to Washington, D.C. (IAD)

    Icelandair airfare from London to Washington, D.C. - starting at GBP 365

    GBP

    London (LON)to

    Washington, D.C. (IAD)
    16 12 2026 - 27 12 2026
    From
    GBP 365
    Viewed 5 hrs ago
    Round trip
    Economy

    London (LON)to

    Washington, D.C. (IAD)
    16 12 2026 - 06 01 2027
    From
    GBP 365
    Viewed 5 hrs ago
    Round trip
    Economy

    London (LON)to

    Washington, D.C. (IAD)
    16 12 2026 - 07 01 2027
    From
    GBP 365
    Viewed 5 hrs ago
    Round trip
    Economy

    London (LON)to

    Washington, D.C. (IAD)
    16 12 2026 - 08 01 2027
    From
    GBP 365
    Viewed 5 hrs ago
    Round trip
    Economy

    London (LON)to

    Washington, D.C. (IAD)
    17 12 2026 - 06 01 2027
    From
    GBP 365
    Viewed 5 hrs ago
    Round trip
    Economy
    *Fares displayed have been collected within the last 72 hours and may no longer be available at the time of booking. We display fares for Economy Light as standard, but it is possible to change your class of service during the booking process. You can also add baggage meals and extra legroom to your trip during booking.

    Flights from London (LON) to Washington, D.C. (IAD) in the next 365 days

    Book ahead and find our best prices in 2026 and beyond

    GBP
    Flights from London (LON) to Washington, D.C. (IAD) in the next 365 days
    From
    To
    Fare type
    Dates
    Price
    London (LON)Washington, D.C. (IAD)Round trip
    /
    Economy
    16 12 2026 - 27 12 2026

    From

    GBP 365

    Viewed 5 hrs ago

    London (LON)Washington, D.C. (IAD)Round trip
    /
    Economy
    16 12 2026 - 06 01 2027

    From

    GBP 365

    Viewed 5 hrs ago

    London (LON)Washington, D.C. (IAD)Round trip
    /
    Economy
    16 12 2026 - 07 01 2027

    From

    GBP 365

    Viewed 5 hrs ago

    *Fares displayed have been collected within the last 72hrs and may no longer be available at the time of booking. We display fares for Economy Light as standard but it is possible to change your class of service during the booking process. You can also add baggage, meals and extra legroom to your trip during booking.

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    Flights from London to Washington, D.C.

    Choose Icelandair to fly from London (LHR/LGW) to Washington, D.C. (IAD). Enjoy our refreshing travel experience, which includes hundreds of hours of movies and music in our in-seat entertainment system, USB chargers in every seat and Wi-Fi access. You'll enjoy an easy transit at our Keflavik hub and one of the shortest flying times between North America and Europe.

    The Heartbeat of History

    The North-East corner of the United States is the birthplace of the nation and you would be hard pressed to find an American city where history is as vividly present as in Washington, D.C. A visit to the National Mall is unmissable, both for first-time visitors as it has a plethora of landmarks to experience as well as for returning guests as there is always something new to discover. Ask “Honest Abe” for inspiration at the Lincoln Memorial, visit the Thomas Jefferson Memorial or gaze in awe at the great Washington Monument Obelisk, the tallest monumental column in the world standing at almost 555 feet.

    But there’s so much more to the National Mall than mere memorials and monuments. History comes alive in all 23 institutions of the Smithsonian and a visit to the National Gallery of Art will leave you awestruck. Don’t forget to visit the United States Capitol Building and then there is the White House itself, the world’s most famous presidential residence by far. Grab a bike-for-rent and explore the sights at your convenience, swiftly and safely.

    The Wharf On the Waterfront

    Washington D.C. may be situated inland but it is nonetheless a waterfront city, thanks to the Potomac river. Among the most vibrant and interesting neighborhoods to visit is the Wharf, a lively mile-long stretch along the river with numerous exciting retailers, interesting restaurants, and the nation’s oldest operating fish market. With multiple intimate music venues and the award-winning Anthem Concert Hall, there is something for everyone when it comes to the performance arts.

    Georgetown on my mind

    With lovely cobblestone streets full of beautiful row houses, Georgetown is a quintessential part of the city for any visitor. Good restaurants, interesting shops, not to mention a gorgeous park along the waterfront. As Washington’s oldest section, this pre-revolutionary part of town has more than its share of tales of the eerie and unexplained, and if ghost stories float your boat then check out the free walking tours where historians offer an insight to some lesser known chapters of the city’s past.

    Add a stopover in Iceland to your journey

    Passengers flying from London to Washington D.C. with Icelandair have the option to stopover in Iceland. Pack more experience into your travel by adding a stopover on our island to your journey, for anywhere from 1 to 7 days and at no additional airfare. You will have the opportunity to explore Iceland's lava fields, glacial lagoons, geyser, waterfalls and caves, and to visit the charming capital of Reykjavik.

    Flying with Icelandair: more than just a journey