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

Return flights

01 Dec - 08 Dec	KLM
13 Dec - 17 Dec	Lufthansa
30 Dec - 06 Jan	British Airways
13 Dec - 20 Dec	TAP
23 Dec - 06 Jan	British Airways
22 Dec - 06 Jan	SWISS
26 Dec - 06 Jan	SWISS
26 Dec - 01 Jan	SWISS
20 Dec - 09 Jan	Air Transat
27 Dec - 10 Jan	British Airways
25 Dec - 03 Jan	Vueling Airlines
20 Dec - 27 Dec	SWISS
30 Dec - 05 Jan	British Airways
30 Dec - 03 Jan	TAP

Also check the deals for one-way flights from Porto to Cancun in December.

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 December from $663

Return flights