Cheapest return flights from Boston to Seoul in September from $937

AirHint found the following cheapest return flights from Boston (BOS) to Seoul (ICN) in September 2026 (see full year).

Return flights

28 Sep - 07 Oct Cathay Pacific
04 Sep - 13 Sep Cathay Pacific
12 Sep - 19 Sep Cathay Pacific
06 Sep - 27 Sep Hainan Airlines
18 Sep - 26 Sep Hainan Airlines
04 Sep - 13 Sep Korean Air direct
18 Sep - 26 Sep Delta direct
12 Sep - 19 Sep Delta direct
28 Sep - 07 Oct Delta direct

Also check the deals for one-way flights from Boston to Seoul in September.

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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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