AirHint found the following cheapest return flights from Mexico City (MEX) to Porto (OPO) in August 2025 (see full year).

Return flights

27 Aug - 23 Sep	Air Canada
02 Aug - 04 Sep	Aeromexico
27 Aug - 06 Sep	Viva
03 Aug - 24 Aug	Aeromexico
26 Aug - 06 Sep	United
31 Aug - 20 Sep	Volaris
28 Aug - 08 Sep	Iberia
02 Aug - 10 Aug	Volaris
31 Aug - 21 Sep	United

Also check the deals for one-way flights from Mexico City to Porto in August.

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 Porto in August from $918

Return flights