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

Return flights

07 Sep - 16 Sep	Xiamen Airlines
01 Sep - 15 Sep	Asiana Airlines
16 Sep - 23 Sep	Asiana Airlines
14 Sep - 24 Sep	Asiana Airlines
22 Sep - 24 Sep	Asiana Airlines
11 Sep - 18 Sep	Asiana Airlines
01 Sep - 10 Sep	Asiana Airlines
22 Sep - 03 Oct	Singapore Airlines	direct
01 Sep - 31 Oct	United
16 Sep - 13 Oct	United
23 Sep - 07 Oct	United
18 Sep - 25 Sep	United
12 Sep - 18 Sep	Asiana Airlines
07 Sep - 16 Sep	Singapore Airlines	direct
01 Sep - 31 Oct	Singapore Airlines	direct
16 Sep - 13 Oct	Singapore Airlines	direct
23 Sep - 07 Oct	Singapore Airlines	direct

Also check the deals for one-way flights from Los Angeles to Singapore 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 Singapore in September from $649

Return flights