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

Return flights

08 Dec - 17 Dec	Aeromexico
23 Dec - 25 Dec	Frontier Airlines
12 Dec - 29 Dec	Frontier Airlines
10 Dec - 03 Jan	Hawaiian Airlines
17 Dec - 31 Dec	Hawaiian Airlines
27 Dec - 03 Jan	Volaris
18 Dec - 04 Jan	Frontier Airlines
23 Dec - 25 Dec	Volaris	direct
12 Dec - 29 Dec	Volaris	direct
17 Dec - 31 Dec	Volaris	direct
27 Dec - 03 Jan	Volaris	direct
18 Dec - 04 Jan	Volaris	direct

Also check the deals for one-way flights from Portland to Guadalajara 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 Guadalajara in December from $386

Return flights