American Airlines flights from Harlingen to Seattle

Recent searches for flights from Harlingen to Seattle

Sep 2026
From$521*
Updated: 4 hours ago
Round tripIEconomy
Oct 2026
From$291*
Updated: 4 hours ago
Round tripIEconomy
Nov 2026
From$291*
Updated: 4 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $291
cmp-daily-histogram-bars-legend-max-price-aria-label $744
Displaying fares for September-2026
  • HRL–SEA: cmp-view-offers-disclaimer. Find Offers
    17

    Th

    SEP

  • HRL–SEA, 09/18/26 – 09/25/26: From $677
    18

    Fr

  • HRL–SEA, 09/19/26 – 09/26/26: From $593
    19

    Sa

  • HRL–SEA, 09/20/26 – 09/27/26: From $677
    20

    Su

  • HRL–SEA, 09/21/26 – 09/28/26: From $677
    21

    Mo

  • HRL–SEA, 09/22/26 – 09/29/26: From $593
    22

    Tu

  • HRL–SEA, 09/23/26 – 09/30/26: From $593
    23

    We

  • HRL–SEA, 09/24/26 – 10/01/26: From $563
    24

    Th

  • HRL–SEA, 09/25/26 – 10/02/26: From $647
    25

    Fr

  • HRL–SEA, 09/26/26 – 10/03/26: From $521
    26

    Sa

  • HRL–SEA, 09/27/26 – 10/04/26: From $647
    27

    Su

  • HRL–SEA, 09/28/26 – 10/05/26: From $674
    28

    Mo

  • HRL–SEA, 09/29/26 – 10/06/26: From $521
    29

    Tu

  • HRL–SEA, 09/30/26 – 10/07/26: From $521
    30

    We

  • HRL–SEA, 10/01/26 – 10/08/26: From $523
    01

    Th

    OCT

  • HRL–SEA, 10/02/26 – 10/09/26: From $640
    02

    Fr

  • HRL–SEA, 10/03/26 – 10/10/26: From $494
    03

    Sa

  • HRL–SEA, 10/04/26 – 10/11/26: From $744
    04

    Su

  • HRL–SEA, 10/05/26 – 10/12/26: From $645
    05

    Mo

  • HRL–SEA, 10/06/26 – 10/13/26: From $415
    06

    Tu

  • HRL–SEA, 10/07/26 – 10/14/26: From $415
    07

    We

  • HRL–SEA, 10/08/26 – 10/15/26: From $725
    08

    Th

  • HRL–SEA, 10/09/26 – 10/16/26: From $691
    09

    Fr

  • HRL–SEA, 10/10/26 – 10/17/26: From $479
    10

    Sa

  • HRL–SEA, 10/11/26 – 10/18/26: From $703
    11

    Su

  • HRL–SEA, 10/12/26 – 10/19/26: From $538
    12

    Mo

  • HRL–SEA, 10/13/26 – 10/20/26: From $291
    13

    Tu

  • HRL–SEA, 10/14/26 – 10/21/26: From $348
    14

    We

  • HRL–SEA: cmp-view-offers-disclaimer. Find Offers
    15

    Th

  • HRL–SEA: cmp-view-offers-disclaimer. Find Offers
    16

    Fr

    • range$291-$744

    DisclaimerFares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Fares listed may be Basic Economy, which class is subject to additional terms and conditions. Additional baggage fees and charges for optional products and services may apply.

    Find deals on Harlingen to Seattle flights

    $
    keyboard_arrow_down

    Harlingen (HRL)to

    Seattle (SEA)
    10/13/26 - 10/20/26

    Round trip

    Economy

    from
    $291Fare subject to changes
    Updated: 4 hours ago

    Harlingen (HRL)to

    Seattle (SEA)
    11/07/26 - 11/14/26

    Round trip

    Economy

    from
    $291Fare subject to changes
    Updated: 4 hours ago

    Harlingen (HRL)to

    Seattle (SEA)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $291Fare subject to changes
    Updated: 4 hours ago

    Harlingen (HRL)to

    Seattle (SEA)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $291Fare subject to changes
    Updated: 4 hours ago

    Harlingen (HRL)to

    Seattle (SEA)
    10/27/26 - 11/03/26

    Round trip

    Economy

    from
    $291Fare subject to changes
    Updated: 4 hours ago

    Harlingen (HRL)to

    Seattle (SEA)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $291Fare subject to changes
    Updated: 4 hours ago

    Harlingen (HRL)to

    Seattle (SEA)
    11/03/26 - 11/10/26

    Round trip

    Economy

    from
    $291Fare subject to changes
    Updated: 4 hours ago

    Harlingen (HRL)to

    Seattle (SEA)
    11/04/26 - 11/11/26

    Round trip

    Economy

    from
    $291Fare subject to changes
    Updated: 4 hours ago

    *Fares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Some fares listed may include one or more connections that are Basic Economy, which class is subject to additional terms and conditions. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Additional baggage fees and charges for optional products and services may apply.

    Earn up to $300 back on your next
    American Airlines flight

    Plus, 40,000 bonus miles with this credit card offer. Offers vary elsewhere. Terms apply.

    Learn more
    $300 statement credit
    40,000 bonus miles
    AAdvantage credit card