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

Return flights

30 Dec - 15 Jan	Aeromexico
05 Dec - 18 Dec	American Airlines
03 Dec - 18 Dec	American Airlines
01 Dec - 08 Dec	Hawaiian Airlines
07 Dec - 18 Dec	Aeromexico
01 Dec - 05 Dec	American Airlines
10 Dec - 10 Jan	Hawaiian Airlines
24 Dec - 01 Jan	Aeromexico
20 Dec - 31 Dec	Hawaiian Airlines
17 Dec - 30 Dec	Volaris
17 Dec - 20 Dec	Alaska Airlines
21 Dec - 28 Dec	Aeromexico
18 Dec - 05 Jan	Frontier Airlines
25 Dec - 02 Jan	Delta
23 Dec - 01 Jan	American Airlines
19 Dec - 05 Jan	Hawaiian Airlines
20 Dec - 03 Jan	Hawaiian Airlines
21 Dec - 03 Jan	American Airlines

Also check the deals for one-way flights from Portland 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 Portland to Mexico City in December from $415

Return flights