Cheapest return flights from Boston to Seoul in September from $940

Best time to book flights for Boston (BOS) to Seoul (ICN) flights at AirHint

AirHint found the following cheapest return flights from Boston (BOS) to Seoul (ICN) in September 2025 (see full year).

Return flights

04 Sep - 17 Sep Cathay Pacific
04 Sep - 18 Sep Cathay Pacific
17 Sep - 29 Sep Cathay Pacific
10 Sep - 22 Sep Cathay Pacific
05 Sep - 18 Sep WestJet
14 Sep - 21 Sep WestJet
05 Sep - 19 Sep Hainan Airlines
12 Sep - 26 Sep Cathay Pacific
14 Sep - 28 Sep Cathay Pacific
07 Sep - 23 Sep Cathay Pacific
17 Sep - 06 Oct Air Canada
17 Sep - 06 Oct Delta direct

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

Skyscanner

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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