AirHint found the following cheapest return flights from Seoul (ICN) to Los Angeles (LAX) in September 2026 (see full year).

Return flights

14 Sep - 18 Sep	United
09 Sep - 12 Sep	United
08 Sep - 17 Sep	United
08 Sep - 23 Sep	United
15 Sep - 22 Sep	United
03 Sep - 13 Sep	United
05 Sep - 11 Sep	United
12 Sep - 18 Sep	United
08 Sep - 18 Sep	United
14 Sep - 18 Sep	Air Premia	direct
26 Sep - 03 Oct	United
26 Sep - 04 Oct	United
25 Sep - 02 Oct	United
25 Sep - 03 Oct	United
26 Sep - 05 Oct	United
28 Sep - 10 Oct	Air Canada
25 Sep - 07 Oct	United
28 Sep - 07 Oct	Philippine Airlines
26 Sep - 10 Oct	Philippine Airlines
29 Sep - 09 Oct	Philippine Airlines

Also check the deals for one-way flights from Seoul to Los Angeles 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 Seoul to Los Angeles in September from $416

Return flights