Cheapest return flights from Boston to Seoul in December from $1222

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

Return flights

04 Dec - 09 Jan Cathay Pacific
10 Dec - 07 Jan Cathay Pacific
16 Dec - 20 Jan Air Canada
10 Dec - 02 Jan United
24 Dec - 05 Jan Finnair
25 Dec - 28 Dec United
18 Dec - 30 Dec Finnair
24 Dec - 08 Jan jetBlue
25 Dec - 28 Dec Delta direct
19 Dec - 05 Jan Delta
18 Dec - 30 Dec Korean Air direct
18 Dec - 03 Jan Cathay Pacific
19 Dec - 03 Jan Delta
18 Dec - 03 Jan Korean Air direct

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

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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