Cheapest return flights from Boston to Seoul in December from $1198

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 December 2025 (see full year).

Return flights

12 Dec - 19 Jan Air Canada
12 Dec - 12 Jan Air Canada
25 Dec - 01 Jan United
23 Dec - 02 Jan jetBlue
25 Dec - 11 Jan Korean Air direct
16 Dec - 04 Jan Lufthansa
25 Dec - 01 Jan Korean Air direct
17 Dec - 04 Jan jetBlue
19 Dec - 05 Jan Delta

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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