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

Return flights

04 Mar - 11 Mar	Copa
11 Mar - 18 Mar	Copa
12 Mar - 17 Mar	Copa
12 Mar - 16 Mar	Copa
04 Mar - 08 Mar	Copa
14 Mar - 21 Mar	Copa

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

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to Port-of-spain in March from 264€

Return flights