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

Return flights

13 Sep - 16 Sep	Aeromexico
10 Sep - 17 Sep	Iberia
05 Sep - 12 Sep	Viva
24 Sep - 08 Oct	Iberia
07 Sep - 24 Sep	Iberia
22 Sep - 24 Sep	Iberia
08 Sep - 15 Sep	Aeromexico
20 Sep - 28 Sep	Volaris
08 Sep - 14 Sep	Volaris
24 Sep - 03 Oct	Iberia
02 Sep - 09 Sep	Iberia
03 Sep - 14 Sep	Volaris
23 Sep - 07 Oct	Air France
24 Sep - 07 Oct	Air France
16 Sep - 14 Oct	Iberia
14 Sep - 20 Oct	Iberia
18 Sep - 04 Oct	Iberia
05 Sep - 04 Oct	Iberia
18 Sep - 19 Oct	Air France

Also check the deals for one-way flights from Mexico City to Lisbon 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 Mexico City to Lisbon in September from $860

Return flights