Southwest® flights from St. Louis to Phoenix from $205

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Low fares from St. Louis to Phoenix

$

St. Louis (STL)to

Phoenix (PHX)
Depart: 01/06/2027

One-way

Basic

From
$205
Seen: 14 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 02/20/2027

One-way

Basic

From
$205
Seen: 15 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 12/19/2026

One-way

Basic

From
$205
Seen: 11 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 12/05/2026

One-way

Basic

From
$205
Seen: 12 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 01/09/2027

One-way

Basic

From
$205
Seen: 6 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 01/26/2027

One-way

Basic

From
$205
Seen: 5 hrs ago

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Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

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Explore flights from St. Louis to Phoenix

Nov 2026
From$316*
Seen: 5 hrs ago
One Way/Basic
Dec 2026
From$205*
Seen: 10 hrs ago
One Way/Basic
Jan 2027
From$205*
Seen: 4 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $205
cmp-daily-histogram-bars-legend-max-price-aria-label $367
Displaying fares for November-2026
  • STL–PHX, 11/12/2026: From $367
    12

    Thu

    NOV

  • STL–PHX, 11/13/2026: From $362
    13

    Fri

  • STL–PHX, 11/14/2026: From $316
    14

    Sat

  • STL–PHX, 11/15/2026: From $362
    15

    Sun

  • STL–PHX, 11/16/2026: From $367
    16

    Mon

  • STL–PHX, 11/17/2026: From $316
    17

    Tue

  • STL–PHX, 11/18/2026: From $316
    18

    Wed

  • STL–PHX, 11/19/2026: From $362
    19

    Thu

  • STL–PHX, 11/20/2026: From $362
    20

    Fri

  • STL–PHX, 11/21/2026: From $316
    21

    Sat

  • STL–PHX, 11/22/2026: From $362
    22

    Sun

  • STL–PHX, 11/23/2026: From $362
    23

    Mon

  • STL–PHX, 11/24/2026: From $316
    24

    Tue

  • STL–PHX, 11/25/2026: From $316
    25

    Wed

  • STL–PHX, 11/26/2026: From $350
    26

    Thu

  • STL–PHX, 11/27/2026: From $350
    27

    Fri

  • STL–PHX, 11/28/2026: From $316
    28

    Sat

  • STL–PHX, 11/29/2026: From $350
    29

    Sun

  • STL–PHX, 11/30/2026: From $350
    30

    Mon

  • STL–PHX, 12/01/2026: From $316
    01

    Tue

    DEC

  • STL–PHX, 12/02/2026: From $205
    02

    Wed

  • STL–PHX, 12/03/2026: From $225
    03

    Thu

  • STL–PHX, 12/04/2026: From $245
    04

    Fri

  • STL–PHX, 12/05/2026: From $205
    05

    Sat

  • STL–PHX, 12/06/2026: From $300
    06

    Sun

  • STL–PHX, 12/07/2026: From $225
    07

    Mon

  • STL–PHX, 12/08/2026: From $205
    08

    Tue

  • STL–PHX, 12/09/2026: From $205
    09

    Wed

  • STL–PHX, 12/10/2026: From $225
    10

    Thu

  • STL–PHX, 12/11/2026: From $240
    11

    Fri

    • Range$205-$367

    *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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