Flights from Seattle (SEA) to Saint Louis (STL) on Alaska Airlines

Lowest fares from Seattle to Saint Louis

Nov 2026
From$329*
Seen: 19 hours ago
Flight Type One Way|Saver
Dec 2026
From$244*
Seen: 19 hours ago
Flight Type One Way|Saver
Jan 2027
From$244*
Seen: 19 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $244
cmp-daily-histogram-bars-legend-max-price-aria-label $584
Displaying fares for November-2026
  • SEA–STL, Nov 14, 2026: From $329
    14

    Sa

    NOV

  • SEA–STL, Nov 15, 2026: From $454
    15

    Su

  • SEA–STL, Nov 16, 2026: From $454
    16

    Mo

  • SEA–STL, Nov 17, 2026: From $454
    17

    Tu

  • SEA–STL, Nov 18, 2026: From $454
    18

    We

  • SEA–STL, Nov 19, 2026: From $389
    19

    Th

  • SEA–STL, Nov 20, 2026: From $389
    20

    Fr

  • SEA–STL, Nov 21, 2026: From $389
    21

    Sa

  • SEA–STL, Nov 22, 2026: From $389
    22

    Su

  • SEA–STL, Nov 23, 2026: From $389
    23

    Mo

  • SEA–STL, Nov 24, 2026: From $449
    24

    Tu

  • SEA–STL, Nov 25, 2026: From $389
    25

    We

  • SEA–STL, Nov 26, 2026: From $329
    26

    Th

  • SEA–STL, Nov 27, 2026: From $329
    27

    Fr

  • SEA–STL, Nov 28, 2026: From $329
    28

    Sa

  • SEA–STL, Nov 29, 2026: From $584
    29

    Su

  • SEA–STL, Nov 30, 2026: From $389
    30

    Mo

  • SEA–STL, Dec 1, 2026: From $389
    01

    Tu

    DEC

  • SEA–STL, Dec 2, 2026: From $389
    02

    We

  • SEA–STL, Dec 3, 2026: From $244
    03

    Th

  • SEA–STL, Dec 4, 2026: From $244
    04

    Fr

  • SEA–STL, Dec 5, 2026: From $244
    05

    Sa

  • SEA–STL, Dec 6, 2026: From $244
    06

    Su

  • SEA–STL, Dec 7, 2026: From $244
    07

    Mo

  • SEA–STL, Dec 8, 2026: From $244
    08

    Tu

  • SEA–STL, Dec 9, 2026: From $244
    09

    We

  • SEA–STL, Dec 10, 2026: From $244
    10

    Th

  • SEA–STL, Dec 11, 2026: From $244
    11

    Fr

  • SEA–STL, Dec 12, 2026: From $244
    12

    Sa

  • SEA–STL, Dec 13, 2026: From $244
    13

    Su

    • Range$244-$584

    *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 Seattle to Saint Louis.*

    $
    keyboard_arrow_down
    One-way low-fare flights Seattle to Saint Louis.*
    From
    To
    Fare Type
    Dates
    Price
    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Dec 7, 2026

    From

    $244

    Seen: 19 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Dec 8, 2026

    From

    $244

    Seen: 19 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Dec 24, 2026

    From

    $244

    Seen: 19 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Dec 28, 2026

    From

    $244

    Seen: 19 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Jan 3, 2027

    From

    $244

    Seen: 19 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Jan 13, 2027

    From

    $244

    Seen: 19 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Jan 15, 2027

    From

    $244

    Seen: 19 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Jan 17, 2027

    From

    $244

    Seen: 19 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.

    Frequently Asked Questions on flights from Seattle (SEA) to Saint Louis (STL)

    When is the best time to book a flight from Seattle to Saint Louis?

    Want to find the lowest fares by day and time flying from Seattle to Saint Louis on Alaska Airlines or Hawaiian Airlines? Check out our flight search widget.

    Can I earn points on my flight to Saint Louis?

    Yes, with Atmosâ„¢ Rewards you can earn points on flights to 1000+ destinations worldwide through the growing network of Alaska and Hawaiian Airlines. Not an Atmosâ„¢ Rewards member yet? Learn more and join today.

    Can I rent a car when I arrive at Lambert-St Louis Int'l Airport?

    Yes, you can rent a car at Lambert-St Louis Int'l Airport. Check availability and book now

    Where can I find the status of my flight to Saint Louis?

    You can check the status of your upcoming Alaska Airlines flight on our flight schedule page.

    Where can I find answers to questions about flying with Alaska Airlines?

    Visit the Alaska Airlines Help Center to quickly browse our help pages by category to find the information you need.

    Can I change or cancel my Alaska Airlines flight to Saint Louis?

    Yes, you can review, modify, or cancel a reservation from our Manage Your Reservation tool. You can learn more about our policy for changing or cancelling a reservation here. 

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