New York to San Juan

What the Data Says About JFK to SJU

The New York to San Juan corridor (JFK → SJU) covers roughly 1,598 miles and is served by 6 carriers, based on Bureau of Transportation Statistics reporting. Across 19,069 flights in the dataset, this route posts a 72.3% on-time rate with an average delay of 76.1 minutes when flights run late. Over the most recent 24 months of BTS data, 7,713 flights were recorded on this pairing — 81 cancelled (1.1%) and 12 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 6 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 19,069 total flights analyzed, the 72.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 76.1-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, Sep 2024 posted the best performance on this corridor at 86% on-time, while Mar 2024 came in at 61% on-time — a 25-point gap between best and worst recent month. For travelers evaluating the JFK to SJU route, the combination of a 72.3% on-time rate, 76.1-minute average delay, 1.1% recent cancellation rate, and 6 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.