AirHint found the following cheapest return flights from Portland (PDX) to Mexico City (MEX) in March 2026 (see full year).
Return flights
| 06 Mar - 16 Mar | Volaris | ||
| 16 Mar - 22 Mar | Hawaiian Airlines | ||
| 13 Mar - 21 Mar | Frontier Airlines | ||
| 21 Mar - 29 Mar | Hawaiian Airlines | ||
| 20 Mar - 28 Mar | Frontier Airlines |
Also check the deals for one-way flights from Portland to Mexico City in March.
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