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

Return flights

26 Aug - 06 Sep	United
30 Aug - 14 Sep	Air Europa
31 Aug - 08 Sep	Air Canada
31 Aug - 07 Sep	Air Europa
27 Aug - 05 Sep	Air Europa
30 Aug - 08 Sep	United
24 Aug - 08 Sep	Air Canada
31 Aug - 06 Sep	Ryanair
19 Aug - 26 Aug	British Airways
14 Aug - 21 Aug	Vueling Airlines
18 Aug - 25 Aug	KLM
26 Aug - 02 Sep	Ryanair
25 Aug - 29 Aug	Air Europa
18 Aug - 24 Aug	Ryanair
17 Aug - 26 Aug	British Airways
12 Aug - 19 Aug	Air Transat
17 Aug - 29 Aug	Ryanair
25 Aug - 01 Sep	Ryanair
18 Aug - 30 Aug	Lufthansa
12 Aug - 16 Aug	Air Canada

Also check the deals for one-way flights from Porto to Cancun 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 Porto to Cancun in August from $742

Return flights