Fort Lauderdale to San Juan

What the Data Says About FLL to SJU

The Fort Lauderdale to San Juan corridor (FLL → SJU) covers roughly 1,046 miles and is served by 14 carriers, based on Bureau of Transportation Statistics reporting. Across 14,622 flights in the dataset, this route posts a 74.8% on-time rate with an average delay of 66.5 minutes when flights run late. Over the most recent 24 months of BTS data, 4,744 flights were recorded on this pairing — 35 cancelled (0.7%) and 4 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 14 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 14,622 total flights analyzed, the 74.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 66.5-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 83% on-time, while Dec 2025 came in at 57% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the FLL to SJU route, the combination of a 74.8% on-time rate, 66.5-minute average delay, 0.7% recent cancellation rate, and 14 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.