AirHint found the following cheapest return flights from Phoenix (PHX) to Mexico City (MEX) in December 2025 (see full year).

Return flights

05 Dec - 09 Dec	Aeromexico	direct
03 Dec - 07 Dec	Aeromexico	direct
12 Dec - 11 Jan	Aeromexico	direct
09 Dec - 13 Dec	Frontier Airlines
09 Dec - 13 Dec	Aeromexico	direct
14 Dec - 18 Dec	Volaris
10 Dec - 15 Dec	Volaris
28 Dec - 14 Jan	Delta	direct
19 Dec - 26 Dec	Volaris
20 Dec - 10 Jan	Volaris
20 Dec - 09 Jan	Volaris
20 Dec - 11 Jan	Volaris
10 Dec - 14 Dec	Frontier Airlines
11 Dec - 17 Dec	Frontier Airlines
30 Dec - 05 Jan	Volaris
19 Dec - 09 Jan	Volaris
20 Dec - 28 Dec	Volaris
30 Dec - 05 Jan	Aeromexico	direct
28 Dec - 07 Jan	Volaris
26 Dec - 07 Jan	Volaris

Also check the deals for one-way flights from Phoenix to Mexico City 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 Phoenix to Mexico City in December from $285

Return flights