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

Return flights

30 Mar - 17 Apr	Turkish Airlines
31 Mar - 17 Apr	Turkish Airlines
18 Mar - 25 Mar	Turkish Airlines
03 Mar - 13 Mar	Turkish Airlines
27 Mar - 16 Apr	Turkish Airlines
08 Mar - 21 Mar	Turkish Airlines
27 Mar - 05 Apr	Turkish Airlines
27 Mar - 04 Apr	Turkish Airlines
18 Mar - 25 Mar	Delta	direct
03 Mar - 13 Mar	Delta	direct
27 Mar - 16 Apr	Delta	direct
31 Mar - 17 Apr	Delta	direct
30 Mar - 17 Apr	Delta	direct
27 Mar - 05 Apr	Delta	direct
27 Mar - 04 Apr	Delta	direct

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

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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Cheapest return flights from Boston to Seoul in March from 767€

Return flights