Flights from Boise, ID to St. Louis, MO

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Best Deals on Flights From Boise, ID (BOI) to St. Louis, MO (STL)

Nov 2026
from$356*
Last seen: 3 hours ago
One-way/Economy
Dec 2026
from$174*
Last seen: 6 hours ago
One-way/Economy
Jan 2027
No results for this month.
cmp-daily-histogram-bars-legend-min-price-aria-label $356
Displaying fares for November-2026
  • BOI–STL: cmp-view-offers-disclaimer. Find Offers
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  • BOI–STL, Nov 28, 2026: from $356
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    • Range$356

    *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 Boise, ID 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®.

    Boise, ID St. Louis, MO

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