Southwest® flights from St. Louis to Boston from $154

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Low fares from St. Louis to Boston

$

St. Louis (STL)to

Boston (BOS)
Depart: 01/06/2027

One-way

Basic

From
$154
Seen: 12 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 12/03/2026

One-way

Basic

From
$154
Seen: 20 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 12/04/2026

One-way

Basic

From
$154
Seen: 22 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 11/26/2026

One-way

Basic

From
$154
Seen: 20 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 01/23/2027

One-way

Basic

From
$154
Seen: 17 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 11/12/2026

One-way

Basic

From
$154
Seen: 18 hrs ago

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Explore flights from St. Louis to Boston

Oct 2026
From$311*
Seen: 12 hrs ago
One Way/Basic
Nov 2026
From$154*
Seen: 18 hrs ago
One Way/Basic
Dec 2026
From$154*
Seen: 13 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $154
cmp-daily-histogram-bars-legend-max-price-aria-label $370
Displaying fares for October-2026
  • STL–BOS, 10/22/2026: From $370
    22

    Thu

    OCT

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

    Fri

  • STL–BOS, 10/24/2026: From $311
    24

    Sat

  • STL–BOS, 10/25/2026: From $360
    25

    Sun

  • STL–BOS: cmp-view-offers-disclaimer. Find Offers
    26

    Mon

  • STL–BOS, 10/27/2026: From $311
    27

    Tue

  • STL–BOS: cmp-view-offers-disclaimer. Find Offers
    28

    Wed

  • STL–BOS, 10/29/2026: From $360
    29

    Thu

  • STL–BOS: cmp-view-offers-disclaimer. Find Offers
    30

    Fri

  • STL–BOS, 10/31/2026: From $311
    31

    Sat

  • STL–BOS, 11/01/2026: From $360
    01

    Sun

    NOV

  • STL–BOS, 11/02/2026: From $360
    02

    Mon

  • STL–BOS, 11/03/2026: From $334
    03

    Tue

  • STL–BOS, 11/04/2026: From $311
    04

    Wed

  • STL–BOS, 11/05/2026: From $321
    05

    Thu

  • STL–BOS, 11/06/2026: From $321
    06

    Fri

  • STL–BOS, 11/07/2026: From $311
    07

    Sat

  • STL–BOS, 11/08/2026: From $321
    08

    Sun

  • STL–BOS, 11/09/2026: From $154
    09

    Mon

  • STL–BOS: cmp-view-offers-disclaimer. Find Offers
    10

    Tue

  • STL–BOS: cmp-view-offers-disclaimer. Find Offers
    11

    Wed

  • STL–BOS, 11/12/2026: From $154
    12

    Thu

  • STL–BOS, 11/13/2026: From $154
    13

    Fri

  • STL–BOS, 11/14/2026: From $294
    14

    Sat

  • STL–BOS, 11/15/2026: From $154
    15

    Sun

  • STL–BOS, 11/16/2026: From $154
    16

    Mon

  • STL–BOS, 11/17/2026: From $154
    17

    Tue

  • STL–BOS, 11/18/2026: From $154
    18

    Wed

  • STL–BOS, 11/19/2026: From $164
    19

    Thu

  • STL–BOS, 11/20/2026: From $216
    20

    Fri

  • STL–BOS, 11/21/2026: From $169
    21

    Sat

    • Range$154-$370

    *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:
    Lambert-St Louis Int'l Airport
    Arriving at:
    Logan International Airport
    Average flight time:
    2 hours 33 minutes
    Distance:
    1047 miles

    Questions we hear the most

    The average flight time from St. Louis to Boston is 2 hours 33 minutes.
    There are 148 weekly flights from St. Louis to Boston on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to Boston 3 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to Boston 3 times per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly St. Louis to Boston with Southwest, check out our Low Fare Calendar.
    You can rent a car at Logan International Airport book yours with your flight.
    Yes! Flights from St. Louis to Boston—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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