Southwest® flights from St. Louis to Jacksonville from $128

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Low fares from St. Louis to Jacksonville

$

St. Louis (STL)to

Jacksonville (JAX)
Depart: 12/17/2026

One-way

Basic

From
$128
Seen: 20 hrs ago

St. Louis (STL)to

Jacksonville (JAX)
Depart: 12/08/2026

One-way

Basic

From
$128
Seen: 17 hrs ago

St. Louis (STL)to

Jacksonville (JAX)
Depart: 12/10/2026

One-way

Basic

From
$128
Seen: 17 hrs ago

St. Louis (STL)to

Jacksonville (JAX)
Depart: 12/01/2026

One-way

Basic

From
$128
Seen: 11 hrs ago

St. Louis (STL)to

Jacksonville (JAX)
Depart: 11/02/2026

One-way

Basic

From
$128
Seen: 12 hrs ago

St. Louis (STL)to

Jacksonville (JAX)
Depart: 10/12/2026

One-way

Basic

From
$128
Seen: 19 hrs ago

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Explore flights from St. Louis to Jacksonville

Sep 2026
From$134*
Seen: 4 hrs ago
One Way/Basic
Oct 2026
From$128*
Seen: 12 hrs ago
One Way/Basic
Nov 2026
From$128*
Seen: 23 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $128
cmp-daily-histogram-bars-legend-max-price-aria-label $460
Displaying fares for September-2026
  • STL–JAX: cmp-view-offers-disclaimer. Find Offers
    08

    Tue

    SEP

  • STL–JAX, 09/09/2026: From $460
    09

    Wed

  • STL–JAX, 09/10/2026: From $460
    10

    Thu

  • STL–JAX, 09/11/2026: From $460
    11

    Fri

  • STL–JAX, 09/12/2026: From $460
    12

    Sat

  • STL–JAX, 09/13/2026: From $460
    13

    Sun

  • STL–JAX, 09/14/2026: From $339
    14

    Mon

  • STL–JAX, 09/15/2026: From $339
    15

    Tue

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

    Wed

  • STL–JAX, 09/17/2026: From $339
    17

    Thu

  • STL–JAX, 09/18/2026: From $339
    18

    Fri

  • STL–JAX, 09/19/2026: From $339
    19

    Sat

  • STL–JAX, 09/20/2026: From $339
    20

    Sun

  • STL–JAX: cmp-view-offers-disclaimer. Find Offers
    21

    Mon

  • STL–JAX, 09/22/2026: From $214
    22

    Tue

  • STL–JAX, 09/23/2026: From $214
    23

    Wed

  • STL–JAX: cmp-view-offers-disclaimer. Find Offers
    24

    Thu

  • STL–JAX, 09/25/2026: From $214
    25

    Fri

  • STL–JAX, 09/26/2026: From $214
    26

    Sat

  • STL–JAX, 09/27/2026: From $214
    27

    Sun

  • STL–JAX, 09/28/2026: From $134
    28

    Mon

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

    Tue

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

    Wed

  • STL–JAX, 10/01/2026: From $160
    01

    Thu

    OCT

  • STL–JAX, 10/02/2026: From $194
    02

    Fri

  • STL–JAX, 10/03/2026: From $150
    03

    Sat

  • STL–JAX, 10/04/2026: From $208
    04

    Sun

  • STL–JAX, 10/05/2026: From $138
    05

    Mon

  • STL–JAX: cmp-view-offers-disclaimer. Find Offers
    06

    Tue

  • STL–JAX, 10/07/2026: From $128
    07

    Wed

    • Range$128-$460

    *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:
    Jacksonville International Airport
    Average flight time:
    1 hour 55 minutes
    Distance:
    753 miles

    Route Information

    140† Weekly flights
    • 2‡ Nonstop flights per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 2‡ Nonstop flights on Sunday

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    The average flight time from St. Louis to Jacksonville is 1 hour 55 minutes.
    There are 140 weekly flights from St. Louis to Jacksonville on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to Jacksonville 2 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to Jacksonville once per day on Saturdays and 2 times per day on Sundays.
    To find the lowest fares by day and time to fly St. Louis to Jacksonville with Southwest, check out our Low Fare Calendar.
    You can rent a car at Jacksonville International Airport book yours with your flight.
    Yes! Flights from St. Louis to Jacksonville—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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