Southwest® flights from St. Louis to Phoenix from $199

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Low fares from St. Louis to Phoenix

$

St. Louis (STL)to

Phoenix (PHX)
Depart: 11/12/2026

One-way

Basic

From
$199
Seen: 16 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 12/14/2026

One-way

Basic

From
$199
Seen: 16 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 12/07/2026

One-way

Basic

From
$199
Seen: 16 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 10/24/2026

One-way

Basic

From
$199
Seen: 19 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 10/17/2026

One-way

Basic

From
$199
Seen: 14 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 10/31/2026

One-way

Basic

From
$199
Seen: 13 hrs ago

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Explore flights from St. Louis to Phoenix

Sep 2026
From$291*
Seen: 12 hrs ago
One Way/Basic
Oct 2026
From$199*
Seen: 23 hrs ago
One Way/Basic
Nov 2026
From$199*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $199
cmp-daily-histogram-bars-legend-max-price-aria-label $347
Displaying fares for September-2026
  • STL–PHX, 09/11/2026: From $337
    11

    Fri

    SEP

  • STL–PHX, 09/12/2026: From $291
    12

    Sat

  • STL–PHX, 09/13/2026: From $337
    13

    Sun

  • STL–PHX, 09/14/2026: From $337
    14

    Mon

  • STL–PHX, 09/15/2026: From $301
    15

    Tue

  • STL–PHX, 09/16/2026: From $336
    16

    Wed

  • STL–PHX, 09/17/2026: From $337
    17

    Thu

  • STL–PHX, 09/18/2026: From $337
    18

    Fri

  • STL–PHX, 09/19/2026: From $336
    19

    Sat

  • STL–PHX, 09/20/2026: From $337
    20

    Sun

  • STL–PHX, 09/21/2026: From $337
    21

    Mon

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

    Tue

  • STL–PHX, 09/23/2026: From $301
    23

    Wed

  • STL–PHX, 09/24/2026: From $347
    24

    Thu

  • STL–PHX, 09/25/2026: From $325
    25

    Fri

  • STL–PHX, 09/26/2026: From $291
    26

    Sat

  • STL–PHX, 09/27/2026: From $325
    27

    Sun

  • STL–PHX, 09/28/2026: From $325
    28

    Mon

  • STL–PHX, 09/29/2026: From $291
    29

    Tue

  • STL–PHX, 09/30/2026: From $291
    30

    Wed

  • STL–PHX, 10/01/2026: From $199
    01

    Thu

    OCT

  • STL–PHX, 10/02/2026: From $209
    02

    Fri

  • STL–PHX, 10/03/2026: From $199
    03

    Sat

  • STL–PHX, 10/04/2026: From $275
    04

    Sun

  • STL–PHX, 10/05/2026: From $199
    05

    Mon

  • STL–PHX, 10/06/2026: From $235
    06

    Tue

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

    Wed

  • STL–PHX, 10/08/2026: From $235
    08

    Thu

  • STL–PHX, 10/09/2026: From $209
    09

    Fri

  • STL–PHX, 10/10/2026: From $204
    10

    Sat

    • Range$199-$347

    *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:
    Sky Harbor International Airport
    Average flight time:
    3 hours 19 minutes
    Distance:
    1262 miles

    Route Information

    156† Weekly flights
    • 4‡ Nonstop flights per day Monday through Friday
    • 4‡ Nonstop flights on Saturday
    • 4‡ 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 Phoenix is 3 hours 19 minutes.
    There are 156 weekly flights from St. Louis to Phoenix on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to Phoenix 4 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to Phoenix 4 times per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly St. Louis to Phoenix with Southwest, check out our Low Fare Calendar.
    You can rent a car at Sky Harbor International Airport book yours with your flight.
    Yes! Flights from St. Louis to Phoenix—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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