Flights from London to Washington, D.C. available from GBP 383*

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

Displaying fares for August-2026
  • LON–IAD, 19 08 2026 – 07 09 2026: From GBP 728
    19

    We

    AUG

  • LON–IAD, 20 08 2026 – 07 09 2026: From GBP 628
    20

    Th

  • LON–IAD, 21 08 2026 – 07 09 2026: From GBP 791
    21

    Fr

  • LON–IAD, 22 08 2026 – 07 09 2026: From GBP 789
    22

    Sa

  • LON–IAD, 23 08 2026 – 07 09 2026: From GBP 760
    23

    Su

  • LON–IAD, 24 08 2026 – 07 09 2026: From GBP 922
    24

    Mo

  • LON–IAD, 25 08 2026 – 07 09 2026: From GBP 547
    25

    Tu

  • LON–IAD, 26 08 2026 – 07 09 2026: From GBP 512
    26

    We

  • LON–IAD, 27 08 2026 – 07 09 2026: From GBP 404
    27

    Th

  • LON–IAD, 28 08 2026 – 07 09 2026: From GBP 403
    28

    Fr

  • LON–IAD, 29 08 2026 – 07 09 2026: From GBP 403
    29

    Sa

  • LON–IAD, 30 08 2026 – 07 09 2026: From GBP 576
    30

    Su

  • LON–IAD, 31 08 2026 – 07 09 2026: From GBP 410
    31

    Mo

  • LON–IAD, 01 09 2026 – 07 09 2026: From GBP 408
    01

    Tu

    SEP

  • LON–IAD, 02 09 2026 – 07 09 2026: From GBP 408
    02

    We

  • LON–IAD, 03 09 2026 – 07 09 2026: From GBP 408
    03

    Th

  • LON–IAD, 04 09 2026 – 07 09 2026: From GBP 408
    04

    Fr

  • LON–IAD, 05 09 2026 – 07 09 2026: From GBP 408
    05

    Sa

  • LON–IAD, 06 09 2026 – 05 10 2026: From GBP 793
    06

    Su

  • LON–IAD, 07 09 2026 – 03 10 2026: From GBP 488
    07

    Mo

  • LON–IAD, 08 09 2026 – 05 10 2026: From GBP 486
    08

    Tu

  • LON–IAD, 09 09 2026 – 05 10 2026: From GBP 410
    09

    We

  • LON–IAD, 10 09 2026 – 06 10 2026: From GBP 408
    10

    Th

  • LON–IAD, 11 09 2026 – 06 10 2026: From GBP 582
    11

    Fr

  • LON–IAD, 12 09 2026 – 05 10 2026: From GBP 683
    12

    Sa

  • LON–IAD, 13 09 2026 – 03 10 2026: From GBP 553
    13

    Su

  • LON–IAD, 14 09 2026 – 03 10 2026: From GBP 928
    14

    Mo

  • LON–IAD, 15 09 2026 – 03 10 2026: From GBP 410
    15

    Tu

  • LON–IAD, 16 09 2026 – 06 10 2026: From GBP 410
    16

    We

  • LON–IAD, 17 09 2026 – 03 10 2026: From GBP 410
    17

    Th

  • LON–IAD, 18 09 2026 – 03 10 2026: From GBP 410
    18

    Fr

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

    Icelandair airfare starting at GBP 383

    GBP

    London (LHR)to

    Washington, D.C. (IAD)
    01 10 2026 - 23 10 2026
    From
    GBP 383
    Viewed 2 days ago
    Round trip
    Economy

    London (LHR)to

    Washington, D.C. (IAD)
    23 09 2026 - 27 09 2026
    From
    GBP 414
    Viewed 8 hrs ago
    Round trip
    Economy

    London (LGW)to

    Washington, D.C. (IAD)
    20 10 2026 - 23 10 2026
    From
    GBP 392
    Viewed 7 hrs ago
    Round trip
    Economy

    London (LGW)to

    Washington, D.C. (IAD)
    06 10 2026 - 12 10 2026
    From
    GBP 403
    Viewed 1 day ago
    Round trip
    Economy

    London (LON)to

    Washington, D.C. (IAD)
    21 10 2026 - 26 10 2026
    From
    GBP 392
    Viewed 21 hrs ago
    Round trip
    Economy

    London (LON)to

    Washington, D.C. (IAD)
    21 10 2026 - 30 10 2026
    From
    GBP 392
    Viewed 21 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 (LHR)Washington, D.C. (IAD)Round trip
    /
    Economy
    01 10 2026 - 23 10 2026

    From

    GBP 383

    Viewed 2 days ago

    London (LGW)Washington, D.C. (IAD)Round trip
    /
    Economy
    20 10 2026 - 23 10 2026

    From

    GBP 392

    Viewed 7 hrs ago

    London (LON)Washington, D.C. (IAD)Round trip
    /
    Economy
    24 12 2026 - 09 01 2027

    From

    GBP 392

    Viewed 21 hrs ago

    London (LON)Washington, D.C. (IAD)Round trip
    /
    Economy
    25 12 2026 - 09 01 2027

    From

    GBP 392

    Viewed 21 hrs ago

    London (LON)Washington, D.C. (IAD)Round trip
    /
    Economy
    21 10 2026 - 24 10 2026

    From

    GBP 392

    Viewed 21 hrs ago

    London (LGW)Washington, D.C. (IAD)Round trip
    /
    Economy
    06 10 2026 - 12 10 2026

    From

    GBP 403

    Viewed 1 day ago

    London (LHR)Washington, D.C. (IAD)Round trip
    /
    Economy
    23 09 2026 - 27 09 2026

    From

    GBP 414

    Viewed 8 hrs ago

    London (LGW)Washington, D.C. (IAD)Round trip
    /
    Economy
    19 12 2026 - 26 12 2026

    From

    GBP 664

    Viewed 4 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.

    Make the most of your trip

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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