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

Return flights

30 Sep - 04 Oct	Viva
01 Sep - 27 Sep	Viva
01 Sep - 04 Sep	Viva
29 Sep - 13 Oct	Viva
04 Sep - 10 Sep	Viva
01 Sep - 28 Sep	Viva
08 Sep - 09 Sep	Viva
23 Sep - 07 Oct	Viva
04 Sep - 07 Sep	Viva
29 Sep - 25 Oct	Viva
04 Sep - 09 Sep	Viva
30 Sep - 15 Oct	Viva
29 Sep - 15 Oct	Viva
28 Sep - 15 Oct	Viva
15 Sep - 17 Sep	Viva
01 Sep - 08 Sep	Viva
08 Sep - 23 Sep	Viva
18 Sep - 08 Oct	Viva
27 Sep - 15 Oct	Viva
22 Sep - 16 Oct	Viva

Also check the deals for one-way flights from Los Angeles to Mexico City 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 Mexico City in September from $221

Return flights