When we recommend leaving Samaná or Las Terrenas
We recommend leaving 5 hours before your flight out of STI when coming from the Samaná peninsula. This is the longest domestic leg we run, crossing from the peninsula onto the mainland highway network before joining the route toward Santiago, and the peninsula roads themselves are narrower and slower than the Autopista Duarte. STI's small terminal clears quickly, so nearly all of the extra time is for the road itself and a genuine safety margin, since this is the one route where a delay is expensive in lost time rather than lost minutes. If you are starting from Las Galeras, the furthest point on the peninsula, or during hurricane-season rain, plan for the top end of the drive-time range or add more.