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

Return flights

23 Dec - 09 Jan	Frontier Airlines
25 Dec - 01 Jan	Volaris
29 Dec - 05 Jan	Volaris
23 Dec - 06 Jan	Frontier Airlines
28 Dec - 01 Jan	Frontier Airlines
24 Dec - 28 Dec	Volaris
23 Dec - 28 Dec	Frontier Airlines
23 Dec - 04 Jan	Frontier Airlines
23 Dec - 02 Jan	Frontier Airlines
23 Dec - 26 Dec	Frontier Airlines
23 Dec - 03 Jan	Frontier Airlines
24 Dec - 28 Dec	Delta	direct
23 Dec - 09 Jan	Delta	direct
25 Dec - 01 Jan	Delta	direct
23 Dec - 26 Dec	Delta	direct
23 Dec - 28 Dec	Delta	direct

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 429€

Return flights