American Airlines flights from Boston to Saint Louis

Recent searches for flights from Boston to Saint Louis

Sep 2026
From$451*
Updated: 2 hours ago
Round tripIEconomy
Oct 2026
From$301*
Updated: 2 hours ago
Round tripIEconomy
Nov 2026
From$301*
Updated: 2 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $301
cmp-daily-histogram-bars-legend-max-price-aria-label $709
Displaying fares for September-2026
  • BOS–STL, 09/17/26 – 09/24/26: From $709
    17

    Th

    SEP

  • BOS–STL, 09/18/26 – 09/25/26: From $699
    18

    Fr

  • BOS–STL, 09/19/26 – 09/26/26: From $601
    19

    Sa

  • BOS–STL, 09/20/26 – 09/27/26: From $699
    20

    Su

  • BOS–STL, 09/21/26 – 09/28/26: From $699
    21

    Mo

  • BOS–STL, 09/22/26 – 09/29/26: From $601
    22

    Tu

  • BOS–STL, 09/23/26 – 10/10/26: From $461
    23

    We

  • BOS–STL, 09/24/26 – 10/01/26: From $670
    24

    Th

  • BOS–STL, 09/25/26 – 10/02/26: From $670
    25

    Fr

  • BOS–STL, 09/26/26 – 10/03/26: From $611
    26

    Sa

  • BOS–STL, 09/27/26 – 10/04/26: From $706
    27

    Su

  • BOS–STL, 09/28/26 – 10/05/26: From $587
    28

    Mo

  • BOS–STL, 09/29/26 – 10/06/26: From $451
    29

    Tu

  • BOS–STL, 09/30/26 – 10/07/26: From $461
    30

    We

  • BOS–STL, 10/01/26 – 10/05/26: From $483
    01

    Th

    OCT

  • BOS–STL, 10/02/26 – 10/05/26: From $483
    02

    Fr

  • BOS–STL, 10/03/26 – 10/06/26: From $451
    03

    Sa

  • BOS–STL, 10/04/26 – 10/11/26: From $604
    04

    Su

  • BOS–STL, 10/05/26 – 10/12/26: From $469
    05

    Mo

  • BOS–STL, 10/06/26 – 10/13/26: From $301
    06

    Tu

  • BOS–STL, 10/07/26 – 10/14/26: From $301
    07

    We

  • BOS–STL, 10/08/26 – 10/15/26: From $365
    08

    Th

  • BOS–STL, 10/09/26 – 10/16/26: From $565
    09

    Fr

  • BOS–STL, 10/10/26 – 10/17/26: From $366
    10

    Sa

  • BOS–STL, 10/11/26 – 10/16/26: From $499
    11

    Su

  • BOS–STL, 10/12/26 – 10/19/26: From $459
    12

    Mo

  • BOS–STL, 10/13/26 – 10/20/26: From $311
    13

    Tu

  • BOS–STL, 10/14/26 – 10/22/26: From $333
    14

    We

  • BOS–STL: cmp-view-offers-disclaimer. Find Offers
    15

    Th

  • BOS–STL: cmp-view-offers-disclaimer. Find Offers
    16

    Fr

    • range$301-$709

    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 Boston to Saint Louis flights

    $
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    Boston (BOS)to

    Saint Louis (STL)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $301Fare subject to changes
    Updated: 2 hours ago

    Boston (BOS)to

    Saint Louis (STL)
    10/24/26 - 10/31/26

    Round trip

    Economy

    from
    $301Fare subject to changes
    Updated: 2 hours ago

    Boston (BOS)to

    Saint Louis (STL)
    10/27/26 - 11/03/26

    Round trip

    Economy

    from
    $301Fare subject to changes
    Updated: 2 hours ago

    Boston (BOS)to

    Saint Louis (STL)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $301Fare subject to changes
    Updated: 2 hours ago

    Boston (BOS)to

    Saint Louis (STL)
    10/17/26 - 10/24/26

    Round trip

    Economy

    from
    $301Fare subject to changes
    Updated: 2 hours ago

    Boston (BOS)to

    Saint Louis (STL)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $301Fare subject to changes
    Updated: 2 hours ago

    Boston (BOS)to

    Saint Louis (STL)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $301Fare subject to changes
    Updated: 2 hours ago

    Boston (BOS)to

    Saint Louis (STL)
    10/06/26 - 10/13/26

    Round trip

    Economy

    from
    $301Fare subject to changes
    Updated: 2 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.

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