Southwest® flights from Boise to St. Louis from $212

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Low fares from Boise to St. Louis

$

Boise (BOI)to

St. Louis (STL)
Depart: 12/17/2026

One-way

Basic

From
$212
Seen: 6 hrs ago

Boise (BOI)to

St. Louis (STL)
Depart: 12/11/2026

One-way

Basic

From
$222
Seen: 10 hrs ago

Boise (BOI)to

St. Louis (STL)
Depart: 12/13/2026

One-way

Basic

From
$254
Seen: 13 hrs ago

Boise (BOI)to

St. Louis (STL)
Depart: 12/17/2026

One-way

Choice

From
$257
Seen: 6 hrs ago

Boise (BOI)to

St. Louis (STL)
Depart: 11/25/2026

One-way

Basic

From
$260
Seen: 23 hrs ago

Boise (BOI)to

St. Louis (STL)
Depart: 11/24/2026

One-way

Basic

From
$260
Seen: 13 hrs ago

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Explore flights from Boise to St. Louis

Nov 2026
From$260*
Seen: 13 hrs ago
One Way/Basic
Dec 2026
From$212*
Seen: 6 hrs ago
One Way/Basic
Jan 2027
No result for this month.
cmp-daily-histogram-bars-legend-min-price-aria-label $260
cmp-daily-histogram-bars-legend-max-price-aria-label $368
Displaying fares for November-2026
  • BOI–STL, 11/09/2026: From $368
    09

    Mon

    NOV

  • BOI–STL, 11/10/2026: From $363
    10

    Tue

  • BOI–STL, 11/11/2026: From $363
    11

    Wed

  • BOI–STL, 11/12/2026: From $368
    12

    Thu

  • BOI–STL, 11/13/2026: From $368
    13

    Fri

  • BOI–STL, 11/14/2026: From $368
    14

    Sat

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    17

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    18

    Wed

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    19

    Thu

  • BOI–STL, 11/20/2026: From $366
    20

    Fri

  • BOI–STL, 11/21/2026: From $275
    21

    Sat

  • BOI–STL: cmp-view-offers-disclaimer. Find Offers
    22

    Sun

  • BOI–STL: cmp-view-offers-disclaimer. Find Offers
    23

    Mon

  • BOI–STL, 11/24/2026: From $260
    24

    Tue

  • BOI–STL, 11/25/2026: From $260
    25

    Wed

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    26

    Thu

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    27

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    28

    Sat

  • BOI–STL: cmp-view-offers-disclaimer. Find Offers
    29

    Sun

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    30

    Mon

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    01

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    DEC

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    02

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    03

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    04

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    05

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    06

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    07

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    08

    Tue

    • Range$260-$368

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

    Flight Details

    Departing from:
    Boise Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Distance:
    1383 miles

    Questions we hear the most

    There are 118 weekly flights from Boise to St. Louis on Southwest Airlines.
    To find the lowest fares by day and time to fly Boise to St. Louis with Southwest, check out our Low Fare Calendar.
    You can rent a car at Lambert-St Louis Int'l Airport book yours with your flight.
    Yes! Flights from Boise to St. Louis—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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