San Juan to Miami

What the Data Says About SJU to MIA

The San Juan to Miami corridor (SJU → MIA) covers roughly 1,045 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 14,957 flights in the dataset, this route posts a 80.5% on-time rate with an average delay of 93.2 minutes when flights run late. Over the most recent 24 months of BTS data, 5,555 flights were recorded on this pairing — 43 cancelled (0.8%) and 8 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 8 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 14,957 total flights analyzed, the 80.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 93.2-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, Oct 2024 posted the best performance on this corridor at 89% on-time, while Mar 2024 came in at 61% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the SJU to MIA route, the combination of a 80.5% on-time rate, 93.2-minute average delay, 0.8% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.