San Juan to Charlotte Amalie

What the Data Says About SJU to STT

The San Juan to Charlotte Amalie corridor (SJU → STT) covers roughly 68 miles and is served by 5 carriers, based on Bureau of Transportation Statistics reporting. Across 2,766 flights in the dataset, this route posts a 77.9% on-time rate with an average delay of 81.3 minutes when flights run late. Over the most recent 24 months of BTS data, 1,082 flights were recorded on this pairing — 12 cancelled (1.1%) and 3 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 5 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 2,766 total flights analyzed, the 77.9% on-time figure is statistically meaningful rather than a small-sample fluke. The 81.3-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Apr 2024 posted the best performance on this corridor at 81% on-time, while Dec 2023 came in at 64% on-time — a 17-point gap between best and worst recent month. For travelers evaluating the SJU to STT route, the combination of a 77.9% on-time rate, 81.3-minute average delay, 1.1% recent cancellation rate, and 5 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.