Atlanta to San Juan

What the Data Says About ATL to SJU

The Atlanta to San Juan corridor (ATL → SJU) covers roughly 1,547 miles and is served by 9 carriers, based on Bureau of Transportation Statistics reporting. Across 9,654 flights in the dataset, this route posts a 78% on-time rate with an average delay of 66.4 minutes when flights run late. Over the most recent 24 months of BTS data, 4,254 flights were recorded on this pairing — 29 cancelled (0.7%) and 11 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 9 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 9,654 total flights analyzed, the 78% on-time figure is statistically meaningful rather than a small-sample fluke. The 66.4-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 Jul 2024 came in at 65% on-time — a 23-point gap between best and worst recent month. For travelers evaluating the ATL to SJU route, the combination of a 78% on-time rate, 66.4-minute average delay, 0.7% recent cancellation rate, and 9 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.