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	WestJet
26 Jul - 09 Aug	jetBlue
19 Jul - 18 Aug	Frontier Airlines
31 Jul - 07 Aug	Air Canada
19 Jul - 17 Aug	Frontier Airlines
08 Jul - 15 Jul	Cathay Pacific
07 Jul - 14 Jul	Turkish Airlines
26 Jul - 02 Aug	Porter Airlines (Canada) Ltd
27 Jul - 28 Aug	United
09 Jul - 16 Jul	Air Canada
15 Jul - 22 Jul	Air Canada
17 Jul - 24 Jul	Air Canada
23 Jul - 30 Jul	Air Canada
28 Jul - 04 Aug	Air Canada
29 Jul - 05 Aug	Air Canada
30 Jul - 06 Aug	Air Canada
21 Jul - 28 Jul	Air Canada
24 Jul - 31 Jul	Air Canada
27 Jul - 03 Aug	Air Canada
06 Jul - 13 Jul	Air Canada

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 971€

Return flights