Southwest® flights from St. Louis to Phoenix from $146

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Low fares from St. Louis to Phoenix

$

St. Louis (STL)to

Phoenix (PHX)
Depart: 01/25/2027

One-way

Basic

From
$146
Seen: 15 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 12/19/2026

One-way

Basic

From
$146
Seen: 16 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 01/13/2027

One-way

Basic

From
$146
Seen: 16 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 11/09/2026

One-way

Basic

From
$146
Seen: 19 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 11/25/2026

One-way

Basic

From
$146
Seen: 20 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 01/26/2027

One-way

Basic

From
$146
Seen: 13 hrs ago

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Explore flights from St. Louis to Phoenix

Oct 2026
From$311*
Seen: 16 hrs ago
One Way/Basic
Nov 2026
From$146*
Seen: 15 hrs ago
One Way/Basic
Dec 2026
From$146*
Seen: 3 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $146
cmp-daily-histogram-bars-legend-max-price-aria-label $357
Displaying fares for October-2026
  • STL–PHX, 10/22/2026: From $357
    22

    Thu

    OCT

  • STL–PHX, 10/23/2026: From $357
    23

    Fri

  • STL–PHX, 10/24/2026: From $311
    24

    Sat

  • STL–PHX, 10/25/2026: From $357
    25

    Sun

  • STL–PHX, 10/26/2026: From $357
    26

    Mon

  • STL–PHX, 10/27/2026: From $311
    27

    Tue

  • STL–PHX, 10/28/2026: From $311
    28

    Wed

  • STL–PHX, 10/29/2026: From $357
    29

    Thu

  • STL–PHX, 10/30/2026: From $357
    30

    Fri

  • STL–PHX, 10/31/2026: From $311
    31

    Sat

  • STL–PHX, 11/01/2026: From $357
    01

    Sun

    NOV

  • STL–PHX, 11/02/2026: From $357
    02

    Mon

  • STL–PHX, 11/03/2026: From $311
    03

    Tue

  • STL–PHX, 11/04/2026: From $345
    04

    Wed

  • STL–PHX, 11/05/2026: From $345
    05

    Thu

  • STL–PHX, 11/06/2026: From $345
    06

    Fri

  • STL–PHX, 11/07/2026: From $311
    07

    Sat

  • STL–PHX, 11/08/2026: From $345
    08

    Sun

  • STL–PHX, 11/09/2026: From $146
    09

    Mon

  • STL–PHX, 11/10/2026: From $146
    10

    Tue

  • STL–PHX, 11/11/2026: From $295
    11

    Wed

  • STL–PHX, 11/12/2026: From $295
    12

    Thu

  • STL–PHX, 11/13/2026: From $181
    13

    Fri

  • STL–PHX, 11/14/2026: From $146
    14

    Sat

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

    Sun

  • STL–PHX, 11/16/2026: From $146
    16

    Mon

  • STL–PHX, 11/17/2026: From $146
    17

    Tue

  • STL–PHX, 11/18/2026: From $146
    18

    Wed

  • STL–PHX, 11/19/2026: From $146
    19

    Thu

  • STL–PHX, 11/20/2026: From $211
    20

    Fri

  • STL–PHX, 11/21/2026: From $146
    21

    Sat

    • Range$146-$357

    *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

    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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