Washington, D.C. (IAD) to Porto (OPO) flights from USD788

*Modifying this information may result in a different fare

*All amounts are in USD. 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. Additional baggage fees may apply.

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Lowest fares between Washington, D.C. and Porto

cmp-daily-histogram-bars-legend-min-price-aria-label USD913
cmp-daily-histogram-bars-legend-max-price-aria-label USD1.4K
Displaying fares for August-2026
  • IAD–OPO, 08/22/2026 – 09/05/2026: From USD1,202
    22

    Sa

    AUG

  • IAD–OPO, 08/23/2026 – 08/30/2026: From USD1,132
    23

    Su

  • IAD–OPO, 08/24/2026 – 08/31/2026: From USD1,132
    24

    Mo

  • IAD–OPO, 08/25/2026 – 09/08/2026: From USD1,072
    25

    Tu

  • IAD–OPO, 08/26/2026 – 09/02/2026: From USD1,072
    26

    We

  • IAD–OPO, 08/27/2026 – 09/17/2026: From USD1,142
    27

    Th

  • IAD–OPO, 08/28/2026 – 09/18/2026: From USD1,142
    28

    Fr

  • IAD–OPO, 08/29/2026 – 09/05/2026: From USD1,202
    29

    Sa

  • IAD–OPO, 08/30/2026 – 09/20/2026: From USD1,132
    30

    Su

  • IAD–OPO, 08/31/2026 – 09/21/2026: From USD1,132
    31

    Mo

  • IAD–OPO, 09/01/2026 – 09/08/2026: From USD1,072
    01

    Tu

    SEP

  • IAD–OPO, 09/02/2026 – 09/09/2026: From USD1,072
    02

    We

  • IAD–OPO, 09/03/2026 – 09/17/2026: From USD1,142
    03

    Th

  • IAD–OPO, 09/04/2026 – 09/25/2026: From USD1,408
    04

    Fr

  • IAD–OPO, 09/05/2026 – 09/12/2026: From USD1,202
    05

    Sa

  • IAD–OPO, 09/06/2026 – 10/04/2026: From USD1,132
    06

    Su

  • IAD–OPO, 09/07/2026 – 09/28/2026: From USD1,132
    07

    Mo

  • IAD–OPO, 09/08/2026 – 09/15/2026: From USD1,072
    08

    Tu

  • IAD–OPO, 09/09/2026 – 09/23/2026: From USD1,080
    09

    We

  • IAD–OPO, 09/10/2026 – 09/24/2026: From USD1,142
    10

    Th

  • IAD–OPO, 09/11/2026 – 10/02/2026: From USD1,142
    11

    Fr

  • IAD–OPO, 09/12/2026 – 09/19/2026: From USD1,202
    12

    Sa

  • IAD–OPO, 09/13/2026 – 09/20/2026: From USD1,132
    13

    Su

  • IAD–OPO, 09/14/2026 – 10/05/2026: From USD1,132
    14

    Mo

  • IAD–OPO, 09/15/2026 – 09/22/2026: From USD1,072
    15

    Tu

  • IAD–OPO, 09/16/2026 – 10/14/2026: From USD1,080
    16

    We

  • IAD–OPO, 09/17/2026 – 09/24/2026: From USD1,025
    17

    Th

  • IAD–OPO, 09/18/2026 – 09/25/2026: From USD1,102
    18

    Fr

  • IAD–OPO, 09/19/2026 – 09/26/2026: From USD981
    19

    Sa

  • IAD–OPO, 09/20/2026 – 10/11/2026: From USD913
    20

    Su

  • IAD–OPO, 09/21/2026 – 10/19/2026: From USD913
    21

    Mo

  • RangeUSD913-USD1,408