Newark to San Juan

What the Data Says About EWR to SJU

The Newark to San Juan corridor (EWR → SJU) covers roughly 1,608 miles and is served by 22 carriers, based on Bureau of Transportation Statistics reporting. Across 12,959 flights in the dataset, this route posts a 70.8% on-time rate with an average delay of 79.2 minutes when flights run late. Over the most recent 24 months of BTS data, 4,500 flights were recorded on this pairing — 69 cancelled (1.5%) and 14 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 22 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 12,959 total flights analyzed, the 70.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 79.2-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, Sep 2024 posted the best performance on this corridor at 88% on-time, while Nov 2025 came in at 61% on-time — a 27-point gap between best and worst recent month. For travelers evaluating the EWR to SJU route, the combination of a 70.8% on-time rate, 79.2-minute average delay, 1.5% recent cancellation rate, and 22 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.