AirHint found the following cheapest one-way flights from Boston (BOS) to Seoul (ICN) in August 2025 (see full year).

One-Way flights

30 Aug	WestJet
15 Aug	WestJet
06 Aug	Porter Airlines (Canada) Ltd
09 Aug	Spirit Airlines
01 Aug	Air Canada
13 Aug	Korean Air	direct
27 Aug	Korean Air	direct
06 Aug	Delta	direct
16 Aug	Korean Air	direct
10 Aug	Korean Air	direct

Also check the deals for return flights from Boston to Seoul in August.

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 one-way flights from Boston to Seoul in August from 443€

One-Way flights