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

Return flights

23 Oct - 30 Oct	Air Canada
02 Oct - 11 Oct	WestJet
02 Oct - 09 Oct	Air Canada
01 Oct - 08 Oct	Air Canada
18 Oct - 03 Nov	Air Canada
02 Oct - 12 Oct	Air Canada
04 Oct - 21 Oct	Spirit Airlines
05 Oct - 12 Oct	Air Canada
14 Oct - 21 Oct	Air Canada
04 Oct - 19 Oct	Spirit Airlines
03 Oct - 10 Oct	Air Canada
06 Oct - 06 Nov	Cathay Pacific
06 Oct - 06 Nov	Delta	direct
18 Oct - 03 Nov	Delta	direct

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

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 October from 747€

Return flights