Cheapest one-way flights from Seattle to Port-of-spain in March from $144

Best time to book flights for Seattle (SEA) to Port-of-spain (POS) flights at AirHint

AirHint found the following cheapest one-way flights from Seattle (SEA) to Port-of-spain (POS) in March 2025 (see full year).

One-Way flights

04 Mar Frontier Airlines

Also check the deals for return flights from Seattle to Port-of-spain in March.

Skyscanner

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.

Book a cheap hotel in Port-of-spain

Cheap car rent in Port-of-spain