Christiansted to Miami

What the Data Says About STX to MIA

The Christiansted to Miami corridor (STX → MIA) covers roughly 1,139 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 3,547 flights in the dataset, this route posts a 81% on-time rate with an average delay of 116.0 minutes when flights run late. Over the most recent 24 months of BTS data, 1,244 flights were recorded on this pairing — 4 cancelled (0.3%) and 4 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 3,547 total flights analyzed, the 81% on-time figure is statistically meaningful rather than a small-sample fluke. The 116.0-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, Dec 2025 posted the best performance on this corridor at 87% on-time, while Jun 2024 came in at 47% on-time — a 39-point gap between best and worst recent month. For travelers evaluating the STX to MIA route, the combination of a 81% on-time rate, 116.0-minute average delay, 0.3% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.