Cheapest return flights from Boston to Seoul in September from $857

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

Return flights

04 Sep - 18 Sep WestJet
11 Sep - 23 Sep Cathay Pacific
16 Sep - 30 Sep Air Canada
02 Sep - 14 Sep Cathay Pacific
04 Sep - 14 Sep Cathay Pacific
12 Sep - 26 Sep Cathay Pacific
12 Sep - 19 Sep United
13 Sep - 20 Sep United
14 Sep - 21 Sep United
15 Sep - 22 Sep United

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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