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

Return flights

29 Aug - 06 Sep	SWISS
24 Aug - 06 Sep	British Airways
19 Aug - 26 Aug	British Airways
23 Aug - 06 Sep	Air France
30 Aug - 06 Sep	Ryanair
12 Aug - 19 Aug	Air Transat
18 Aug - 24 Aug	Ryanair
15 Aug - 18 Aug	KLM
18 Aug - 26 Aug	British Airways
21 Aug - 29 Aug	United
19 Aug - 29 Aug	KLM
11 Aug - 19 Aug	British Airways
06 Aug - 12 Aug	Vueling Airlines
17 Aug - 25 Aug	British Airways

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 $580

Return flights