AirHint found the following cheapest return flights from Los Angeles (LAX) to Seoul (ICN) in September 2025 (see full year).

Return flights

22 Sep - 13 Oct	China Eastern
18 Sep - 15 Oct	China Eastern
07 Sep - 17 Sep	Air Canada
16 Sep - 22 Sep	Flair Airlines
16 Sep - 29 Sep	Air Canada
17 Sep - 24 Sep	Air Canada
06 Sep - 18 Sep	Air Canada
04 Sep - 14 Sep	Flair Airlines
10 Sep - 22 Sep	Air Canada
01 Sep - 12 Sep	Air Canada
01 Sep - 08 Sep	Cathay Pacific
13 Sep - 27 Sep	Air Canada
04 Sep - 09 Oct	China Eastern
29 Sep - 12 Oct	Air Canada
18 Sep - 20 Oct	Cathay Pacific
17 Sep - 15 Oct	Cathay Pacific
22 Sep - 21 Oct	Cathay Pacific
08 Sep - 07 Oct	China Eastern
27 Sep - 11 Oct	China Eastern
19 Sep - 15 Oct	China Eastern

Also check the deals for one-way flights from Los Angeles 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 return flights from Los Angeles to Seoul in September from $676

Return flights