Cheapest return flights from St. Louis to Seoul in November from $845

AirHint found the following cheapest return flights from St. Louis (STL) to Seoul (ICN) in November 2025 (see full year).

Return flights

17 Nov - 24 Nov United
17 Nov - 26 Nov United
11 Nov - 18 Nov American Airlines
20 Nov - 27 Nov Delta
20 Nov - 28 Nov Delta
17 Nov - 28 Nov Delta
17 Nov - 30 Nov Frontier Airlines
21 Nov - 30 Nov Frontier Airlines
22 Nov - 30 Nov Frontier Airlines
24 Nov - 22 Dec Korean Air

Also check the deals for one-way flights from St. Louis to Seoul in November.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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