San Juan to Baltimore

What the Data Says About SJU to BWI

The San Juan to Baltimore corridor (SJU → BWI) covers roughly 1,565 miles and is served by 7 carriers, based on Bureau of Transportation Statistics reporting. Across 7,104 flights in the dataset, this route posts a 81.5% on-time rate with an average delay of 68.2 minutes when flights run late. Over the most recent 24 months of BTS data, 2,620 flights were recorded on this pairing — 26 cancelled (1.0%) and 13 diverted (0.5%). Those baseline metrics tell you what to expect before you book.

Having 7 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,104 total flights analyzed, the 81.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 68.2-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, Nov 2024 posted the best performance on this corridor at 94% on-time, while Aug 2024 came in at 60% on-time — a 33-point gap between best and worst recent month. For travelers evaluating the SJU to BWI route, the combination of a 81.5% on-time rate, 68.2-minute average delay, 1.0% recent cancellation rate, and 7 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.