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: 09/30/2026

One-way

Basic

From
$114
Seen: 23 hrs ago

Pittsburgh (PIT)to

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

One-way

Basic

From
$114
Seen: 23 hrs ago

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 09/05/2026

One-way

Basic

From
$114
Seen: 22 hrs ago

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 10/28/2026

One-way

Basic

From
$114
Seen: 13 hrs ago

Pittsburgh (PIT)to

St. Louis (STL)
Depart: 09/08/2026

One-way

Basic

From
$114
Seen: 14 hrs ago

Pittsburgh (PIT)to

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

One-way

Basic

From
$114
Seen: 10 hrs ago

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Explore flights from Pittsburgh to St. Louis

Aug 2026
From$244*
Seen: 14 hrs ago
One Way/Basic
Sep 2026
From$114*
Seen: 2 hrs ago
One Way/Basic
Oct 2026
From$114*
Seen: 23 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $114
cmp-daily-histogram-bars-legend-max-price-aria-label $513
Displaying fares for August-2026
  • PIT–STL, 08/16/2026: From $513
    16

    Sun

    AUG

  • PIT–STL, 08/17/2026: From $359
    17

    Mon

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    18

    Tue

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    19

    Wed

  • PIT–STL, 08/20/2026: From $359
    20

    Thu

  • PIT–STL, 08/21/2026: From $513
    21

    Fri

  • PIT–STL, 08/22/2026: From $329
    22

    Sat

  • PIT–STL, 08/23/2026: From $435
    23

    Sun

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

    Mon

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    25

    Tue

  • PIT–STL, 08/26/2026: From $329
    26

    Wed

  • PIT–STL, 08/27/2026: From $359
    27

    Thu

  • PIT–STL, 08/28/2026: From $435
    28

    Fri

  • PIT–STL, 08/29/2026: From $244
    29

    Sat

  • PIT–STL, 08/30/2026: From $244
    30

    Sun

  • PIT–STL, 08/31/2026: From $244
    31

    Mon

  • PIT–STL, 09/01/2026: From $244
    01

    Tue

    SEP

  • PIT–STL, 09/02/2026: From $244
    02

    Wed

  • PIT–STL, 09/03/2026: From $244
    03

    Thu

  • PIT–STL, 09/04/2026: From $244
    04

    Fri

  • PIT–STL, 09/05/2026: From $114
    05

    Sat

  • PIT–STL, 09/06/2026: From $213
    06

    Sun

  • PIT–STL, 09/07/2026: From $213
    07

    Mon

  • PIT–STL, 09/08/2026: From $114
    08

    Tue

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    09

    Wed

  • PIT–STL, 09/10/2026: From $114
    10

    Thu

  • PIT–STL, 09/11/2026: From $128
    11

    Fri

  • PIT–STL, 09/12/2026: From $114
    12

    Sat

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    13

    Sun

  • PIT–STL: cmp-view-offers-disclaimer. Find Offers
    14

    Mon

  • PIT–STL, 09/15/2026: From $114
    15

    Tue

    • Range$114-$513

    *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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