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.
Jul 2026
No results for this month.
Aug 2026
from$39*
Last seen: 6 hours ago
One-way/Economy
Sep 2026
from$32*
Last seen: 6 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $39
cmp-daily-histogram-bars-legend-max-price-aria-label $179
Displaying fares for July-2026
  • STL–DEN: cmp-view-offers-disclaimer. Find Offers
    30

    Thu

    JUL

  • STL–DEN: cmp-view-offers-disclaimer. Find Offers
    31

    Fri

  • STL–DEN, Aug 1, 2026: from $179
    01

    Sat

    AUG

  • STL–DEN, Aug 2, 2026: from $179
    02

    Sun

  • STL–DEN, Aug 3, 2026: from $179
    03

    Mon

  • STL–DEN, Aug 4, 2026: from $179
    04

    Tue

  • STL–DEN, Aug 5, 2026: from $169
    05

    Wed

  • STL–DEN, Aug 6, 2026: from $169
    06

    Thu

  • STL–DEN, Aug 7, 2026: from $169
    07

    Fri

  • STL–DEN, Aug 8, 2026: from $169
    08

    Sat

  • STL–DEN, Aug 9, 2026: from $154
    09

    Sun

  • STL–DEN, Aug 10, 2026: from $169
    10

    Mon

  • STL–DEN, Aug 11, 2026: from $153
    11

    Tue

  • STL–DEN, Aug 12, 2026: from $145
    12

    Wed

  • STL–DEN, Aug 13, 2026: from $145
    13

    Thu

  • STL–DEN, Aug 14, 2026: from $145
    14

    Fri

  • STL–DEN, Aug 15, 2026: from $145
    15

    Sat

  • STL–DEN, Aug 16, 2026: from $145
    16

    Sun

  • STL–DEN, Aug 17, 2026: from $145
    17

    Mon

  • STL–DEN, Aug 18, 2026: from $79
    18

    Tue

  • STL–DEN, Aug 19, 2026: from $107
    19

    Wed

  • STL–DEN, Aug 20, 2026: from $63
    20

    Thu

  • STL–DEN, Aug 21, 2026: from $102
    21

    Fri

  • STL–DEN, Aug 22, 2026: from $128
    22

    Sat

  • STL–DEN, Aug 23, 2026: from $39
    23

    Sun

  • STL–DEN, Aug 24, 2026: from $48
    24

    Mon

  • STL–DEN, Aug 25, 2026: from $98
    25

    Tue

  • STL–DEN, Aug 26, 2026: from $119
    26

    Wed

  • STL–DEN, Aug 27, 2026: from $48
    27

    Thu

  • STL–DEN, Aug 28, 2026: from $102
    28

    Fri

  • STL–DEN, Aug 29, 2026: from $128
    29

    Sat

    • Range$39-$179

    *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 Nov 5, 2026

    From

    $48

    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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