Flights from San Diego, CA to St. Louis, MO

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Best Deals on Flights From San Diego, CA (SAN) to St. Louis, MO (STL)

Sep 2026
from$183*
Last seen: 19 hours ago
One-way/Economy
Oct 2026
from$111*
Last seen: 2 hours ago
One-way/Economy
Nov 2026
from$106*
Last seen: 8 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $111
cmp-daily-histogram-bars-legend-max-price-aria-label $213
Displaying fares for September-2026
  • SAN–STL: cmp-view-offers-disclaimer. Find Offers
    23

    Wed

    SEP

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    24

    Thu

  • SAN–STL, Sep 25, 2026: from $189
    25

    Fri

  • SAN–STL, Sep 26, 2026: from $189
    26

    Sat

  • SAN–STL, Sep 27, 2026: from $189
    27

    Sun

  • SAN–STL, Sep 28, 2026: from $183
    28

    Mon

  • SAN–STL: cmp-view-offers-disclaimer. Find Offers
    29

    Tue

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    30

    Wed

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    01

    Thu

    OCT

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    02

    Fri

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    03

    Sat

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    04

    Sun

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    05

    Mon

  • SAN–STL, Oct 6, 2026: from $123
    06

    Tue

  • SAN–STL, Oct 7, 2026: from $123
    07

    Wed

  • SAN–STL, Oct 8, 2026: from $123
    08

    Thu

  • SAN–STL, Oct 9, 2026: from $163
    09

    Fri

  • SAN–STL, Oct 10, 2026: from $193
    10

    Sat

  • SAN–STL, Oct 11, 2026: from $213
    11

    Sun

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

    Mon

  • SAN–STL, Oct 13, 2026: from $131
    13

    Tue

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    14

    Wed

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    15

    Thu

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    16

    Fri

  • SAN–STL, Oct 17, 2026: from $111
    17

    Sat

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

    Sun

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

    Mon

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

    Tue

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    21

    Wed

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

    Thu

    • Range$111-$213

    *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 San Diego, CA to St. Louis, MO on Frontier

    $
    *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®.

    San Diego, CA St. Louis, MO

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