Flights from Phoenix, AZ to St. Louis, MO

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Best Deals on Flights From Phoenix, AZ (PHX) to St. Louis, MO (STL)

Oct 2026
from$159*
Last seen: 11 hours ago
One-way/Economy
Nov 2026
from$74*
Last seen: 1 hour ago
One-way/Economy
Dec 2026
from$92*
Last seen: 22 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $74
cmp-daily-histogram-bars-legend-max-price-aria-label $240
Displaying fares for October-2026
  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    23

    Fri

    OCT

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    24

    Sat

  • PHX–STL, Oct 25, 2026: from $240
    25

    Sun

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    26

    Mon

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

    Tue

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    28

    Wed

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    29

    Thu

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    30

    Fri

  • PHX–STL, Oct 31, 2026: from $159
    31

    Sat

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    01

    Sun

    NOV

  • PHX–STL, Nov 2, 2026: from $199
    02

    Mon

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    03

    Tue

  • PHX–STL, Nov 4, 2026: from $159
    04

    Wed

  • PHX–STL, Nov 5, 2026: from $179
    05

    Thu

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    06

    Fri

  • PHX–STL, Nov 7, 2026: from $139
    07

    Sat

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    08

    Sun

  • PHX–STL, Nov 9, 2026: from $125
    09

    Mon

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    10

    Tue

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

    Wed

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    12

    Thu

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    13

    Fri

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    14

    Sat

  • PHX–STL, Nov 15, 2026: from $199
    15

    Sun

  • PHX–STL, Nov 16, 2026: from $112
    16

    Mon

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    17

    Tue

  • PHX–STL, Nov 18, 2026: from $74
    18

    Wed

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    19

    Thu

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    20

    Fri

  • PHX–STL, Nov 21, 2026: from $119
    21

    Sat

  • PHX–STL, Nov 22, 2026: from $159
    22

    Sun

    • Range$74-$240

    *Prices found by others in the previous 48 hours for round-trip flights. Prices shown may also require membership in our travel club, Discount Den.

    Flights Deals from Phoenix, AZ to St. Louis, MO on Frontier

    $
    Flights Deals from Phoenix, AZ to St. Louis, MO on Frontier
    From
    To
    Phoenix, AZ (PHX)St. Louis, MO (STL)One-way
    /
    Discount Den Basic Fare    		Departing Feb 23, 2027

    From

    $107

    Last seen: 29 mins ago

    *Prices found by others in the previous 48 hours for one-way flights. Prices shown may also require membership in our travel club, Discount Den®.

    Phoenix, AZ St. Louis, MO

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