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

Return flights

01 Sep - 08 Sep	China Eastern
03 Sep - 10 Sep	China Eastern
01 Sep - 10 Sep	China Eastern
19 Sep - 10 Oct	China Eastern
01 Sep - 31 Oct	Air China
14 Sep - 18 Oct	Air China
11 Sep - 18 Sep	Air China
12 Sep - 19 Sep	Air China
13 Sep - 20 Sep	China Eastern
19 Sep - 08 Oct	China Eastern
10 Sep - 20 Sep	China Eastern
07 Sep - 24 Sep	China Eastern
04 Sep - 24 Sep	Zipair
16 Sep - 18 Oct	China Eastern
18 Sep - 08 Oct	EVA Air
10 Sep - 17 Sep	EVA Air
10 Sep - 01 Oct	EVA Air
09 Sep - 01 Oct	EVA Air
23 Sep - 15 Oct	EVA Air
17 Sep - 18 Oct	EVA Air

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 $766

Return flights