Baltimore to San Juan

What the Data Says About BWI to SJU

The Baltimore to San Juan corridor (BWI → SJU) covers roughly 1,565 miles and is served by 7 carriers, based on Bureau of Transportation Statistics reporting. Across 7,106 flights in the dataset, this route posts a 71.5% on-time rate with an average delay of 65.5 minutes when flights run late. Over the most recent 24 months of BTS data, 2,621 flights were recorded on this pairing — 32 cancelled (1.2%) and 5 diverted (0.2%). 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 7,106 total flights analyzed, the 71.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 65.5-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, Oct 2024 posted the best performance on this corridor at 81% on-time, while Aug 2024 came in at 52% on-time — a 30-point gap between best and worst recent month. For travelers evaluating the BWI to SJU route, the combination of a 71.5% on-time rate, 65.5-minute average delay, 1.2% recent cancellation rate, and 7 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.