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

Return flights

16 Sep - 23 Sep	Avianca
03 Sep - 10 Sep	Avianca
10 Sep - 17 Sep	Volaris
11 Sep - 24 Sep	Volaris
08 Sep - 22 Sep	Viva
03 Sep - 24 Sep	Volaris
08 Sep - 29 Sep	Viva
26 Sep - 29 Sep	Viva
07 Sep - 22 Sep	Viva
16 Sep - 30 Sep	Avianca
26 Sep - 13 Oct	Viva
24 Sep - 01 Oct	Volaris
22 Sep - 13 Oct	Viva
26 Sep - 03 Oct	Viva
26 Sep - 14 Oct	Viva
24 Sep - 01 Oct	Volaris	direct
27 Sep - 13 Oct	Viva
26 Sep - 07 Oct	Viva
26 Sep - 11 Oct	Viva
26 Sep - 10 Oct	Viva

Also check the deals for one-way flights from Miami 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 Miami to Mexico City in September from 35€

Return flights