Porto (OPO) to Washington, D.C. (IAD) flights from EUR503

*Modifying this information may result in a different fare

*All amounts are in EUR. Taxes and surcharges are included. No booking fee is applicable. Fares displayed 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 Porto and Washington, D.C.

cmp-daily-histogram-bars-legend-min-price-aria-label EUR503
cmp-daily-histogram-bars-legend-max-price-aria-label EUR827
Displaying fares for September-2026
  • OPO–IAD, 10/09/2026 – 17/09/2026: From EUR720
    10

    Th

    SEP

  • OPO–IAD, 11/09/2026 – 14/09/2026: From EUR670
    11

    Fr

  • OPO–IAD, 12/09/2026 – 15/09/2026: From EUR706
    12

    Sa

  • OPO–IAD, 13/09/2026 – 11/10/2026: From EUR706
    13

    Su

  • OPO–IAD, 14/09/2026 – 28/09/2026: From EUR827
    14

    Mo

  • OPO–IAD, 15/09/2026 – 29/09/2026: From EUR506
    15

    Tu

  • OPO–IAD, 16/09/2026 – 07/10/2026: From EUR506
    16

    We

  • OPO–IAD, 17/09/2026 – 20/09/2026: From EUR503
    17

    Th

  • OPO–IAD, 18/09/2026 – 21/09/2026: From EUR503
    18

    Fr

  • OPO–IAD, 19/09/2026 – 03/10/2026: From EUR506
    19

    Sa

  • OPO–IAD, 20/09/2026 – 27/09/2026: From EUR503
    20

    Su

  • OPO–IAD, 21/09/2026 – 28/09/2026: From EUR503
    21

    Mo

  • OPO–IAD, 22/09/2026 – 20/10/2026: From EUR503
    22

    Tu

  • OPO–IAD, 23/09/2026 – 07/10/2026: From EUR506
    23

    We

  • OPO–IAD, 24/09/2026 – 27/09/2026: From EUR503
    24

    Th

  • OPO–IAD, 25/09/2026 – 28/09/2026: From EUR503
    25

    Fr

  • OPO–IAD, 26/09/2026 – 29/09/2026: From EUR503
    26

    Sa

  • OPO–IAD, 27/09/2026 – 04/10/2026: From EUR506
    27

    Su

  • OPO–IAD, 28/09/2026 – 05/10/2026: From EUR566
    28

    Mo

  • OPO–IAD, 29/09/2026 – 13/10/2026: From EUR506
    29

    Tu

  • OPO–IAD, 30/09/2026 – 28/10/2026: From EUR506
    30

    We

  • OPO–IAD, 01/10/2026 – 15/10/2026: From EUR506
    01

    Th

    OCT

  • OPO–IAD, 02/10/2026 – 05/10/2026: From EUR503
    02

    Fr

  • OPO–IAD, 03/10/2026 – 06/10/2026: From EUR539
    03

    Sa

  • OPO–IAD, 04/10/2026 – 11/10/2026: From EUR503
    04

    Su

  • OPO–IAD, 05/10/2026 – 26/10/2026: From EUR509
    05

    Mo

  • OPO–IAD, 06/10/2026 – 27/10/2026: From EUR506
    06

    Tu

  • OPO–IAD, 07/10/2026 – 14/10/2026: From EUR506
    07

    We

  • OPO–IAD, 08/10/2026 – 11/10/2026: From EUR503
    08

    Th

  • OPO–IAD, 09/10/2026 – 30/10/2026: From EUR506
    09

    Fr

  • RangeEUR503-EUR827