Greer to Atlanta

What the Data Says About GSP to ATL

The Greer to Atlanta corridor (GSP → ATL) covers roughly 153 miles and is served by 14 carriers, based on Bureau of Transportation Statistics reporting. Across 18,285 flights in the dataset, this route posts a 91.8% on-time rate with an average delay of 83.1 minutes when flights run late. Over the most recent 24 months of BTS data, 5,938 flights were recorded on this pairing — 55 cancelled (0.9%) and 6 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 14 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 18,285 total flights analyzed, the 91.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 83.1-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, Feb 2024 posted the best performance on this corridor at 95% on-time, while Jun 2025 came in at 77% on-time — a 18-point gap between best and worst recent month. For travelers evaluating the GSP to ATL route, the combination of a 91.8% on-time rate, 83.1-minute average delay, 0.9% recent cancellation rate, and 14 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.