AirHint found the following cheapest return flights from Portland (PDX) to Barcelona (BCN) in December 2025 (see full year).
Return flights
| 30 Dec - 20 Jan | Air Canada | ||
| 22 Dec - 09 Jan | Alaska Airlines | ||
| 22 Dec - 08 Jan | British Airways | ||
| 21 Dec - 28 Dec | Delta | ||
| 20 Dec - 27 Dec | Alaska Airlines |
Also check the deals for one-way flights from Portland to Barcelona in December.
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