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

Return flights

16 Jul - 21 Jul	Alaska Airlines
17 Jul - 21 Jul	jetBlue
14 Jul - 21 Jul	Alaska Airlines
17 Jul - 23 Jul	jetBlue
16 Jul - 23 Jul	jetBlue
28 Jul - 11 Aug	WestJet
08 Jul - 11 Jul	Spirit Airlines
28 Jul - 13 Aug	Spirit Airlines
10 Jul - 16 Jul	Porter Airlines (Canada) Ltd
29 Jul - 12 Aug	Air Canada
23 Jul - 30 Jul	Air Canada
30 Jul - 06 Aug	Air Canada
28 Jul - 04 Aug	Air Canada
29 Jul - 05 Aug	Air Canada
31 Jul - 14 Aug	Air Canada
31 Jul - 07 Aug	Air Canada
23 Jul - 31 Jul	WestJet
27 Jul - 03 Aug	Air Canada
25 Jul - 01 Aug	Air Canada
07 Jul - 23 Jul	Etihad Airways

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

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 July from $934

Return flights