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

Return flights

26 Nov - 01 Dec	Cathay Pacific
06 Nov - 16 Nov	Cathay Pacific
10 Nov - 16 Nov	Cathay Pacific
04 Nov - 15 Nov	Cathay Pacific
29 Nov - 06 Dec	Cathay Pacific
28 Nov - 05 Dec	Cathay Pacific
23 Nov - 29 Nov	Air Canada
20 Nov - 30 Nov	Cathay Pacific
20 Nov - 30 Nov	Delta	direct
06 Nov - 16 Nov	Delta	direct
04 Nov - 15 Nov	Delta	direct
15 Nov - 29 Nov	Delta	direct
29 Nov - 06 Dec	Korean Air	direct
28 Nov - 05 Dec	Delta	direct
10 Nov - 16 Nov	Delta	direct
26 Nov - 01 Dec	Korean Air	direct

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

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 November from 742€

Return flights