Cheapest return flights from St. Louis (STL) to San Juan (SJU)

Cheapest month: November 2026, from $ 177. Book in one tap, or open a month for every date.

All destinations from St. Louis (STL)

One-wayReturn

  • November 2026

    4–12 Nov 8 nights
    $ 177 return Cheapest month
    Frontier Airlines
    Price seen 11 Oct
    November dates

  • February 2027

    27 Feb – 5 Mar 2027 6 nights
    $ 408 return
    Alaska Airlines
    Price seen 11 Oct
    February dates

  • June 2027

    3–9 Jun 2027 6 nights
    $ 496 return
    Southwest Airlines
    Price seen 11 Oct
    June dates
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Updated Oct 11, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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