Charlotte Amalie to Miami

What the Data Says About STT to MIA

The Charlotte Amalie to Miami corridor (STT → MIA) covers roughly 1,107 miles and is served by 2 carriers, based on Bureau of Transportation Statistics reporting. Across 5,391 flights in the dataset, this route posts a 84.3% on-time rate with an average delay of 122.8 minutes when flights run late. Over the most recent 24 months of BTS data, 1,777 flights were recorded on this pairing — 12 cancelled (0.7%) and 12 diverted (0.7%). Those baseline metrics tell you what to expect before you book.

Having 2 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 5,391 total flights analyzed, the 84.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 122.8-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, Jun 2025 posted the best performance on this corridor at 91% on-time, while May 2024 came in at 65% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the STT to MIA route, the combination of a 84.3% on-time rate, 122.8-minute average delay, 0.7% recent cancellation rate, and 2 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.