Southwest® flights from Cincinnati to St. Louis from $140

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Low fares from Cincinnati to St. Louis

$

Cincinnati (CVG)to

St. Louis (STL)
Depart: 12/09/2026

One-way

Basic

From
$140
Seen: 5 hrs ago

Cincinnati (CVG)to

St. Louis (STL)
Depart: 11/05/2026

One-way

Basic

From
$140
Seen: 1 hour ago

Cincinnati (CVG)to

St. Louis (STL)
Depart: 10/23/2026

One-way

Basic

From
$158
Seen: 21 hrs ago

Cincinnati (CVG)to

St. Louis (STL)
Depart: 11/13/2026

One-way

Basic

From
$158
Seen: 12 hrs ago

Cincinnati (CVG)to

St. Louis (STL)
Depart: 12/09/2026

One-way

Choice

From
$175
Seen: 5 hrs ago

Cincinnati (CVG)to

St. Louis (STL)
Depart: 11/05/2026

One-way

Choice

From
$175
Seen: 1 hour ago

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Explore flights from Cincinnati to St. Louis

Oct 2026
From$158*
Seen: 21 hrs ago
One Way/Basic
Nov 2026
From$140*
Seen: 1 hour ago
One Way/Basic
Dec 2026
From$140*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $158
Displaying fares for October-2026
  • CVG–STL, 10/01/2026: From $399
    01

    Thu

    OCT

  • CVG–STL, 10/02/2026: From $399
    02

    Fri

  • CVG–STL: cmp-view-offers-disclaimer. Find Offers
    03

    Sat

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    04

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    05

    Mon

  • CVG–STL, 10/06/2026: From $399
    06

    Tue

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

    Wed

  • CVG–STL, 10/08/2026: From $339
    08

    Thu

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

    Fri

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    10

    Sat

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

    Sun

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    12

    Mon

  • CVG–STL, 10/13/2026: From $334
    13

    Tue

  • CVG–STL, 10/14/2026: From $245
    14

    Wed

  • CVG–STL: cmp-view-offers-disclaimer. Find Offers
    15

    Thu

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

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    17

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    18

    Sun

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    19

    Mon

  • CVG–STL, 10/20/2026: From $245
    20

    Tue

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    21

    Wed

  • CVG–STL: cmp-view-offers-disclaimer. Find Offers
    22

    Thu

  • CVG–STL, 10/23/2026: From $158
    23

    Fri

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    24

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    25

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    26

    Mon

  • CVG–STL: cmp-view-offers-disclaimer. Find Offers
    27

    Tue

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

    Wed

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

    Thu

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    30

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  • CVG–STL: cmp-view-offers-disclaimer. Find Offers
    31

    Sat

    • Range$158-$399

    *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:
    Cincinnati/Northern Kentucky Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Distance:
    308 miles

    Route Information

    76† Weekly flights

    † 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

    There are 76 weekly flights from Cincinnati to St. Louis on Southwest Airlines.
    To find the lowest fares by day and time to fly Cincinnati 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 Cincinnati 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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