Cheapest return flights from St. Louis to Seoul in August from $887

AirHint found the following cheapest return flights from St. Louis (STL) to Seoul (ICN) in August 2026 (see full year).

Return flights

30 Aug - 12 Sep Air Canada
10 Aug - 22 Aug Korean Air
04 Aug - 10 Aug Air Canada

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

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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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