AirHint found the following cheapest one-way flights from New York (JFK) to Seoul (ICN) in September 2025 (see full year).

One-Way flights

03 Sep	WestJet
16 Sep	Frontier Airlines
17 Sep	Frontier Airlines
04 Sep	Frontier Airlines
14 Sep	Frontier Airlines
05 Sep	WestJet
23 Sep	Hawaiian Airlines
27 Sep	Hawaiian Airlines
15 Sep	jetBlue
25 Sep	Frontier Airlines

Also check the deals for return flights from New York to Seoul in September.

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 New York to Seoul in September from 377€

One-Way flights