Southwest® flights from Pittsburgh to St. Louis from $114

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Low fares from Pittsburgh to St. Louis

$

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 11/16/2026

One-way

Basic

From
$114
Seen: 21 hrs ago

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 11/18/2026

One-way

Basic

From
$114
Seen: 16 hrs ago

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 12/21/2026

One-way

Basic

From
$114
Seen: 17 hrs ago

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 10/13/2026

One-way

Basic

From
$114
Seen: 21 hrs ago

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 10/24/2026

One-way

Basic

From
$114
Seen: 5 hrs ago

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 11/02/2026

One-way

Basic

From
$114
Seen: 20 hrs ago

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Explore flights from Pittsburgh to St. Louis

Sep 2026
From$254*
Seen: 8 hrs ago
One Way/Basic
Oct 2026
From$114*
Seen: 8 hrs ago
One Way/Basic
Nov 2026
From$114*
Seen: 15 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $114
cmp-daily-histogram-bars-legend-max-price-aria-label $523
Displaying fares for September-2026
  • PIT–STL, 09/12/2026: From $523
    12

    Sat

    SEP

  • PIT–STL, 09/13/2026: From $523
    13

    Sun

  • PIT–STL, 09/14/2026: From $523
    14

    Mon

  • PIT–STL, 09/15/2026: From $523
    15

    Tue

  • PIT–STL, 09/16/2026: From $513
    16

    Wed

  • PIT–STL, 09/17/2026: From $523
    17

    Thu

  • PIT–STL, 09/18/2026: From $445
    18

    Fri

  • PIT–STL, 09/19/2026: From $445
    19

    Sat

  • PIT–STL, 09/20/2026: From $435
    20

    Sun

  • PIT–STL, 09/21/2026: From $445
    21

    Mon

  • PIT–STL, 09/22/2026: From $435
    22

    Tue

  • PIT–STL, 09/23/2026: From $445
    23

    Wed

  • PIT–STL, 09/24/2026: From $445
    24

    Thu

  • PIT–STL, 09/25/2026: From $254
    25

    Fri

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

    Sat

  • PIT–STL, 09/27/2026: From $254
    27

    Sun

  • PIT–STL, 09/28/2026: From $254
    28

    Mon

  • PIT–STL, 09/29/2026: From $254
    29

    Tue

  • PIT–STL, 09/30/2026: From $254
    30

    Wed

  • PIT–STL, 10/01/2026: From $254
    01

    Thu

    OCT

  • PIT–STL, 10/02/2026: From $134
    02

    Fri

  • PIT–STL, 10/03/2026: From $114
    03

    Sat

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    05

    Mon

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

    Tue

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    07

    Wed

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    08

    Thu

  • PIT–STL, 10/09/2026: From $134
    09

    Fri

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

    Sat

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

    Sun

    • Range$114-$523

    *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:
    Pittsburgh International Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Average flight time:
    1 hour 48 minutes
    Distance:
    554 miles

    Route Information

    156† Weekly flights
    • 1‡ Nonstop flight 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 Pittsburgh to St. Louis is 1 hour 48 minutes.
    There are 156 weekly flights from Pittsburgh to St. Louis on Southwest Airlines.
    Yes, Southwest flies nonstop from Pittsburgh to St. Louis once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Pittsburgh to St. Louis once per day on Saturdays and 2 times per day on Sundays.
    To find the lowest fares by day and time to fly Pittsburgh 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 Pittsburgh 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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