Philadelphia to San Juan

What the Data Says About PHL to SJU

The Philadelphia to San Juan corridor (PHL → SJU) covers roughly 1,576 miles and is served by 12 carriers, based on Bureau of Transportation Statistics reporting. Across 9,434 flights in the dataset, this route posts a 72.4% on-time rate with an average delay of 77.7 minutes when flights run late. Over the most recent 24 months of BTS data, 3,081 flights were recorded on this pairing — 50 cancelled (1.6%) and 11 diverted (0.4%). Those baseline metrics tell you what to expect before you book.

Having 12 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 9,434 total flights analyzed, the 72.4% on-time figure is statistically meaningful rather than a small-sample fluke. The 77.7-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 93% on-time, while Jun 2024 came in at 45% on-time — a 48-point gap between best and worst recent month. For travelers evaluating the PHL to SJU route, the combination of a 72.4% on-time rate, 77.7-minute average delay, 1.6% recent cancellation rate, and 12 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.