Southwest® flights from St. Louis to Phoenix from $179

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Low fares from St. Louis to Phoenix

$

St. Louis (STL)to

Phoenix (PHX)
Depart: 11/05/2026

One-way

Basic

From
$179
Seen: 17 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 10/28/2026

One-way

Basic

From
$179
Seen: 14 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 11/07/2026

One-way

Basic

From
$179
Seen: 21 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 11/12/2026

One-way

Basic

From
$179
Seen: 10 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 11/03/2026

One-way

Basic

From
$179
Seen: 11 hrs ago

St. Louis (STL)to

Phoenix (PHX)
Depart: 11/09/2026

One-way

Basic

From
$179
Seen: 13 hrs ago

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Explore flights from St. Louis to Phoenix

Oct 2026
From$179*
Seen: 14 hrs ago
One Way/Basic
Nov 2026
From$179*
Seen: 20 hrs ago
One Way/Basic
Dec 2026
From$199*
Seen: 9 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $179
cmp-daily-histogram-bars-legend-max-price-aria-label $347
Displaying fares for October-2026
  • STL–PHX: cmp-view-offers-disclaimer. Find Offers
    01

    Thu

    OCT

  • STL–PHX, 10/02/2026: From $347
    02

    Fri

  • STL–PHX, 10/03/2026: From $301
    03

    Sat

  • STL–PHX, 10/04/2026: From $347
    04

    Sun

  • STL–PHX, 10/05/2026: From $347
    05

    Mon

  • STL–PHX, 10/06/2026: From $301
    06

    Tue

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

    Wed

  • STL–PHX, 10/08/2026: From $347
    08

    Thu

  • STL–PHX, 10/09/2026: From $347
    09

    Fri

  • STL–PHX, 10/10/2026: From $301
    10

    Sat

  • STL–PHX, 10/11/2026: From $347
    11

    Sun

  • STL–PHX, 10/12/2026: From $347
    12

    Mon

  • STL–PHX, 10/13/2026: From $301
    13

    Tue

  • STL–PHX, 10/14/2026: From $301
    14

    Wed

  • STL–PHX, 10/15/2026: From $335
    15

    Thu

  • STL–PHX, 10/16/2026: From $335
    16

    Fri

  • STL–PHX, 10/17/2026: From $301
    17

    Sat

  • STL–PHX, 10/18/2026: From $335
    18

    Sun

  • STL–PHX, 10/19/2026: From $335
    19

    Mon

  • STL–PHX, 10/20/2026: From $301
    20

    Tue

  • STL–PHX, 10/21/2026: From $301
    21

    Wed

  • STL–PHX, 10/22/2026: From $179
    22

    Thu

  • STL–PHX, 10/23/2026: From $222
    23

    Fri

  • STL–PHX, 10/24/2026: From $179
    24

    Sat

  • STL–PHX, 10/25/2026: From $285
    25

    Sun

  • STL–PHX: cmp-view-offers-disclaimer. Find Offers
    26

    Mon

  • STL–PHX, 10/27/2026: From $179
    27

    Tue

  • STL–PHX, 10/28/2026: From $179
    28

    Wed

  • STL–PHX, 10/29/2026: From $179
    29

    Thu

  • STL–PHX, 10/30/2026: From $222
    30

    Fri

  • STL–PHX, 10/31/2026: From $179
    31

    Sat

    • Range$179-$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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