AirHint found the following cheapest return flights from Washington (IAD) to Port-of-spain (POS) in December 2025 (see full year).
Return flights
| 07 Dec - 10 Dec | Air Canada | ||
| 07 Dec - 09 Dec | Copa | ||
| 01 Dec - 08 Dec | Copa | ||
| 29 Dec - 05 Jan | Frontier Airlines | ||
| 28 Dec - 05 Jan | Frontier Airlines | ||
| 19 Dec - 07 Jan | Frontier Airlines |
Also check the deals for one-way flights from Washington to Port-of-spain in December.
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