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

Return flights

04 Dec - 07 Dec	Volaris
03 Dec - 11 Dec	Frontier Airlines
03 Dec - 07 Dec	Volaris
01 Dec - 04 Dec	Volaris
04 Dec - 08 Dec	Volaris
06 Dec - 09 Dec	Frontier Airlines
03 Dec - 08 Dec	Volaris
08 Dec - 12 Dec	Frontier Airlines
05 Dec - 07 Dec	Volaris
01 Dec - 07 Dec	Volaris
13 Dec - 06 Jan	Volaris
29 Dec - 12 Jan	Volaris
29 Dec - 12 Jan	Aeromexico	direct
31 Dec - 04 Jan	Volaris
30 Dec - 04 Jan	Frontier Airlines
21 Dec - 11 Jan	Volaris
26 Dec - 10 Jan	Volaris
18 Dec - 18 Jan	Volaris
27 Dec - 04 Jan	Volaris
15 Dec - 04 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 $284

Return flights