Alaska Airlines Flights from Chicago to Seattle

Lowest fares from Chicago to Seattle

Aug 2026
From$179*
Seen: 8 hours ago
Flight Type One Way|Saver
Sep 2026
From$129*
Seen: 13 hours ago
Flight Type One Way|Saver
Oct 2026
From$129*
Seen: 13 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $129
cmp-daily-histogram-bars-legend-max-price-aria-label $224
Displaying fares for August-2026
  • ORD–SEA, Aug 12, 2026: From $224
    12

    We

    AUG

  • ORD–SEA, Aug 13, 2026: From $224
    13

    Th

  • ORD–SEA, Aug 14, 2026: From $224
    14

    Fr

  • ORD–SEA, Aug 15, 2026: From $224
    15

    Sa

  • ORD–SEA, Aug 16, 2026: From $224
    16

    Su

  • ORD–SEA, Aug 17, 2026: From $224
    17

    Mo

  • ORD–SEA, Aug 18, 2026: From $224
    18

    Tu

  • ORD–SEA, Aug 19, 2026: From $224
    19

    We

  • ORD–SEA, Aug 20, 2026: From $224
    20

    Th

  • ORD–SEA, Aug 21, 2026: From $224
    21

    Fr

  • ORD–SEA, Aug 22, 2026: From $224
    22

    Sa

  • ORD–SEA, Aug 23, 2026: From $224
    23

    Su

  • ORD–SEA, Aug 24, 2026: From $224
    24

    Mo

  • ORD–SEA, Aug 25, 2026: From $224
    25

    Tu

  • ORD–SEA, Aug 26, 2026: From $224
    26

    We

  • ORD–SEA, Aug 27, 2026: From $224
    27

    Th

  • ORD–SEA, Aug 28, 2026: From $224
    28

    Fr

  • ORD–SEA, Aug 29, 2026: From $224
    29

    Sa

  • ORD–SEA, Aug 30, 2026: From $224
    30

    Su

  • ORD–SEA, Aug 31, 2026: From $179
    31

    Mo

  • ORD–SEA, Sep 1, 2026: From $129
    01

    Tu

    SEP

  • ORD–SEA, Sep 2, 2026: From $129
    02

    We

  • ORD–SEA, Sep 3, 2026: From $129
    03

    Th

  • ORD–SEA, Sep 4, 2026: From $217
    04

    Fr

  • ORD–SEA, Sep 5, 2026: From $129
    05

    Sa

  • ORD–SEA, Sep 6, 2026: From $179
    06

    Su

  • ORD–SEA, Sep 7, 2026: From $186
    07

    Mo

  • ORD–SEA, Sep 8, 2026: From $130
    08

    Tu

  • ORD–SEA, Sep 9, 2026: From $129
    09

    We

  • ORD–SEA, Sep 10, 2026: From $129
    10

    Th

  • ORD–SEA, Sep 11, 2026: From $154
    11

    Fr

    • Range$129-$224

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

    One-way low-fare flights Chicago to Seattle.*

    $
    keyboard_arrow_down
    One-way low-fare flights Chicago to Seattle.*
    From
    To
    Fare Type
    Dates
    Price
    Chicago (ORD)Seattle (SEA)One-way
    |
    Saver    		Depart: Sep 14, 2026

    From

    $129

    Seen: 13 hours ago

    Chicago (ORD)Seattle (SEA)One-way
    |
    Saver    		Depart: Sep 22, 2026

    From

    $129

    Seen: 13 hours ago

    Chicago (ORD)Seattle (SEA)One-way
    |
    Saver    		Depart: Sep 24, 2026

    From

    $129

    Seen: 13 hours ago

    Chicago (ORD)Seattle (SEA)One-way
    |
    Saver    		Depart: Sep 28, 2026

    From

    $129

    Seen: 13 hours ago

    Chicago (ORD)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 6, 2026

    From

    $129

    Seen: 13 hours ago

    Chicago (ORD)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 7, 2026

    From

    $129

    Seen: 13 hours ago

    Chicago (ORD)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 14, 2026

    From

    $129

    Seen: 13 hours ago

    Chicago (ORD)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 29, 2026

    From

    $129

    Seen: 13 hours ago

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

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