AirHint found the following cheapest return flights from Portland (PDX) to Ho Chi Minh City (SGN) in December 2025 (see full year).
Return flights
| 06 Dec - 13 Dec | China Airlines | ||
| 02 Dec - 15 Jan | China Airlines | ||
| 18 Dec - 04 Jan | Hawaiian Airlines |
Also check the deals for one-way flights from Portland to Ho Chi Minh City in December.
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