Southwest® flights from St. Louis to Boston from $170

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Low fares from St. Louis to Boston

$

St. Louis (STL)to

Boston (BOS)
Depart: 01/16/2027

One-way

Basic

From
$170
Seen: 23 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 02/17/2027

One-way

Basic

From
$170
Seen: 21 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 02/09/2027

One-way

Basic

From
$170
Seen: 22 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 12/05/2026

One-way

Basic

From
$175
Seen: 16 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 01/20/2027

One-way

Basic

From
$175
Seen: 13 hrs ago

St. Louis (STL)to

Boston (BOS)
Depart: 12/16/2026

One-way

Basic

From
$175
Seen: 14 hrs ago

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Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

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Explore flights from St. Louis to Boston

Nov 2026
From$316*
Seen: 16 hrs ago
One Way/Basic
Dec 2026
From$175*
Seen: 15 hrs ago
One Way/Basic
Jan 2027
From$170*
Seen: 23 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $175
cmp-daily-histogram-bars-legend-max-price-aria-label $509
Displaying fares for November-2026
  • STL–BOS, 11/11/2026: From $316
    11

    Wed

    NOV

  • STL–BOS, 11/12/2026: From $365
    12

    Thu

  • STL–BOS, 11/13/2026: From $365
    13

    Fri

  • STL–BOS, 11/14/2026: From $316
    14

    Sat

  • STL–BOS, 11/15/2026: From $365
    15

    Sun

  • STL–BOS, 11/16/2026: From $365
    16

    Mon

  • STL–BOS, 11/17/2026: From $316
    17

    Tue

  • STL–BOS, 11/18/2026: From $316
    18

    Wed

  • STL–BOS, 11/19/2026: From $365
    19

    Thu

  • STL–BOS, 11/20/2026: From $365
    20

    Fri

  • STL–BOS, 11/21/2026: From $316
    21

    Sat

  • STL–BOS, 11/22/2026: From $365
    22

    Sun

  • STL–BOS, 11/23/2026: From $365
    23

    Mon

  • STL–BOS, 11/24/2026: From $316
    24

    Tue

  • STL–BOS, 11/25/2026: From $316
    25

    Wed

  • STL–BOS, 11/26/2026: From $326
    26

    Thu

  • STL–BOS, 11/27/2026: From $326
    27

    Fri

  • STL–BOS, 11/28/2026: From $420
    28

    Sat

  • STL–BOS, 11/29/2026: From $509
    29

    Sun

  • STL–BOS, 11/30/2026: From $371
    30

    Mon

  • STL–BOS, 12/01/2026: From $316
    01

    Tue

    DEC

  • STL–BOS, 12/02/2026: From $175
    02

    Wed

  • STL–BOS, 12/03/2026: From $195
    03

    Thu

  • STL–BOS, 12/04/2026: From $210
    04

    Fri

  • STL–BOS, 12/05/2026: From $175
    05

    Sat

  • STL–BOS, 12/06/2026: From $299
    06

    Sun

  • STL–BOS, 12/07/2026: From $195
    07

    Mon

  • STL–BOS, 12/08/2026: From $175
    08

    Tue

  • STL–BOS, 12/09/2026: From $175
    09

    Wed

  • STL–BOS, 12/10/2026: From $195
    10

    Thu

    • Range$175-$509

    *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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