London (LHR) to Washington, D.C. (IAD) flights from GBP416

*Modifying this information may result in a different fare

* All amounts are in GBP including taxes and surcharges, except where taxes are collected locally at the airport. A booking fee is not applicable, but a payment surcharge may apply. Prices and availability may change without notice, see KLM price display for more information. Fares displayed on this page have been collected within the last 48hrs and may no longer be available at time of booking. 

Why book directly on the KLM website?

Explore the benefits of booking through our website.

No hidden costs icon

No hidden costs

Book with confidence. Our rates hide no unpleasant surprises.

24/7 customer service icon

24/7 customer service

Count on direct, personal support whenever you need it, day or night.

Seamless travel icon

Seamless travel

Enjoy a smooth journey with timely updates and automatic rebooking.

Lowest fares between London and Washington, D.C.

cmp-daily-histogram-bars-legend-min-price-aria-label GBP416
cmp-daily-histogram-bars-legend-max-price-aria-label GBP753
Displaying fares for September-2026
  • LHR–IAD, 10/09/2026 – 13/09/2026: From GBP722
    10

    Th

    SEP

  • LHR–IAD, 11/09/2026 – 18/09/2026: From GBP709
    11

    Fr

  • LHR–IAD, 12/09/2026 – 15/09/2026: From GBP702
    12

    Sa

  • LHR–IAD, 13/09/2026 – 20/09/2026: From GBP753
    13

    Su

  • LHR–IAD, 14/09/2026 – 21/09/2026: From GBP684
    14

    Mo

  • LHR–IAD, 15/09/2026 – 22/09/2026: From GBP686
    15

    Tu

  • LHR–IAD, 16/09/2026 – 23/09/2026: From GBP478
    16

    We

  • LHR–IAD, 17/09/2026 – 20/09/2026: From GBP448
    17

    Th

  • LHR–IAD, 18/09/2026 – 21/09/2026: From GBP448
    18

    Fr

  • LHR–IAD, 19/09/2026 – 03/10/2026: From GBP421
    19

    Sa

  • LHR–IAD, 20/09/2026 – 04/10/2026: From GBP416
    20

    Su

  • LHR–IAD, 21/09/2026 – 12/10/2026: From GBP431
    21

    Mo

  • LHR–IAD, 22/09/2026 – 29/09/2026: From GBP473
    22

    Tu

  • LHR–IAD, 23/09/2026 – 30/09/2026: From GBP533
    23

    We

  • LHR–IAD, 24/09/2026 – 27/09/2026: From GBP489
    24

    Th

  • LHR–IAD, 25/09/2026 – 28/09/2026: From GBP455
    25

    Fr

  • LHR–IAD, 26/09/2026 – 03/10/2026: From GBP416
    26

    Sa

  • LHR–IAD, 27/09/2026 – 04/10/2026: From GBP416
    27

    Su

  • LHR–IAD, 28/09/2026 – 12/10/2026: From GBP517
    28

    Mo

  • LHR–IAD, 29/09/2026 – 06/10/2026: From GBP533
    29

    Tu

  • LHR–IAD, 30/09/2026 – 21/10/2026: From GBP477
    30

    We

  • LHR–IAD, 01/10/2026 – 04/10/2026: From GBP436
    01

    Th

    OCT

  • LHR–IAD, 02/10/2026 – 05/10/2026: From GBP455
    02

    Fr

  • LHR–IAD, 03/10/2026 – 24/10/2026: From GBP421
    03

    Sa

  • LHR–IAD, 04/10/2026 – 01/11/2026: From GBP428
    04

    Su

  • LHR–IAD, 05/10/2026 – 12/10/2026: From GBP448
    05

    Mo

  • LHR–IAD, 06/10/2026 – 27/10/2026: From GBP460
    06

    Tu

  • LHR–IAD, 07/10/2026 – 28/10/2026: From GBP460
    07

    We

  • LHR–IAD, 08/10/2026 – 11/10/2026: From GBP444
    08

    Th

  • LHR–IAD, 09/10/2026 – 12/10/2026: From GBP444
    09

    Fr

  • RangeGBP416-GBP753