Flights from St. Louis, MO to Denver, CO

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Best Deals on Flights From St. Louis, MO (STL) to Denver, CO (DEN)

Try alternate month or interact with individual days below in order to find offers.
Oct 2026
No results for this month.
Nov 2026
from$28*
Last seen: 11 hours ago
One-way/Economy
Dec 2026
from$27*
Last seen: 18 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $28
cmp-daily-histogram-bars-legend-max-price-aria-label $323
Displaying fares for October-2026
  • STL–DEN: cmp-view-offers-disclaimer. Find Offers
    31

    Sat

    OCT

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

    Sun

  • STL–DEN, Nov 2, 2026: from $220
    02

    Mon

  • STL–DEN: cmp-view-offers-disclaimer. Find Offers
    03

    Tue

  • STL–DEN, Nov 4, 2026: from $323
    04

    Wed

  • STL–DEN, Nov 5, 2026: from $220
    05

    Thu

  • STL–DEN, Nov 6, 2026: from $179
    06

    Fri

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

    Sat

  • STL–DEN, Nov 8, 2026: from $185
    08

    Sun

  • STL–DEN, Nov 9, 2026: from $185
    09

    Mon

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

    Tue

  • STL–DEN, Nov 11, 2026: from $253
    11

    Wed

  • STL–DEN, Nov 12, 2026: from $179
    12

    Thu

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

    Fri

  • STL–DEN, Nov 14, 2026: from $159
    14

    Sat

  • STL–DEN, Nov 15, 2026: from $159
    15

    Sun

  • STL–DEN, Nov 16, 2026: from $159
    16

    Mon

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

    Tue

  • STL–DEN: cmp-view-offers-disclaimer. Find Offers
    18

    Wed

  • STL–DEN, Nov 19, 2026: from $28
    19

    Thu

  • STL–DEN, Nov 20, 2026: from $43
    20

    Fri

  • STL–DEN, Nov 21, 2026: from $76
    21

    Sat

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

    Sun

  • STL–DEN, Nov 23, 2026: from $76
    23

    Mon

  • STL–DEN, Nov 24, 2026: from $99
    24

    Tue

  • STL–DEN, Nov 25, 2026: from $43
    25

    Wed

  • STL–DEN, Nov 26, 2026: from $78
    26

    Thu

  • STL–DEN, Nov 27, 2026: from $163
    27

    Fri

  • STL–DEN, Nov 28, 2026: from $219
    28

    Sat

  • STL–DEN, Nov 29, 2026: from $219
    29

    Sun

  • STL–DEN, Nov 30, 2026: from $139
    30

    Mon

    • Range$28-$323

    *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 St. Louis, MO to Denver, CO on Frontier

    $
    Flights Deals from St. Louis, MO to Denver, CO on Frontier
    From
    To
    St. Louis, MO (STL)Denver, CO (DEN)One-way
    /
    Discount Den Basic Fare    		Departing Feb 20, 2027

    From

    $43

    Last seen: 15 hours 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®.

    St. Louis, MO Denver, CO

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