AirHint found the following cheapest return flights from Washington (IAD) to Port-of-spain (POS) in May 2026 (see full year).
Return flights
| 12 May - 01 Jun | Frontier Airlines | ||
| 03 May - 10 May | Frontier Airlines | ||
| 20 May - 27 May | United | ||
| 27 May - 31 May | United | ||
| 14 May - 01 Jun | United | ||
| 09 May - 16 May | Copa |
Also check the deals for one-way flights from Washington to Port-of-spain in May.
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