AirHint found the following cheapest return flights from Portland (PDX) to Guadalajara (GDL) in May 2026 (see full year).
Return flights
| 23 May - 27 May | Volaris | direct | |
| 01 May - 07 May | Aeromexico | ||
| 06 May - 20 May | Delta | ||
| 01 May - 07 May | Volaris | direct | |
| 23 May - 08 Jun | Aeromexico | ||
| 23 May - 08 Jun | Volaris | direct |
Also check the deals for one-way flights from Portland to Guadalajara in May.
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