Cheapest return flights from Washington to Port-of-spain in March from $307

AirHint found the following cheapest return flights from Washington (IAD) to Port-of-spain (POS) in March 2026 (see full year).

Return flights

06 Mar - 13 Mar Air Canada
22 Mar - 30 Mar Air Canada
29 Mar - 04 Apr Air Canada
11 Mar - 18 Mar Frontier Airlines
13 Mar - 18 Mar Air Canada
25 Mar - 03 Apr United
26 Mar - 02 Apr United
30 Mar - 04 Apr Air Canada
21 Mar - 30 Mar Air Canada
12 Mar - 22 Mar Frontier Airlines
21 Mar - 29 Mar Frontier Airlines
07 Mar - 13 Mar Air Canada
27 Mar - 04 Apr Allegiant Air

Also check the deals for one-way flights from Washington to Port-of-spain in March.

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