Cheapest return flights from St. Louis (STL) to Seoul (ICN)

Cheapest month: November 2026, from $ 1,095. Book in one tap, or open a month for every date.

All destinations from St. Louis (STL)

One-wayReturn

  • November 2026

    25 Nov – 3 Dec 8 nights
    $ 1,095 return Cheapest month
    Delta
    Price seen 9 Oct
    November dates

  • January 2027

    22 Jan – 12 Feb 2027 21 nights
    $ 1,193 return
    Alaska Airlines
    Price seen 10 Oct
    January dates

  • April 2027

    1–13 Apr 2027 12 nights
    $ 1,096 return
    Delta
    Price seen 9 Oct
    April dates

  • July 2027

    12–19 Jul 2027 7 nights
    $ 1,346 return
    Cathay Pacific
    Price seen 9 Oct
    July dates
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Updated Oct 10, 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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