Atlanta to Greer

What the Data Says About ATL to GSP

The Atlanta to Greer corridor (ATL → GSP) covers roughly 153 miles and is served by 15 carriers, based on Bureau of Transportation Statistics reporting. Across 18,284 flights in the dataset, this route posts a 86.7% on-time rate with an average delay of 60.2 minutes when flights run late. Over the most recent 24 months of BTS data, 5,938 flights were recorded on this pairing — 52 cancelled (0.9%) and 9 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 15 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 18,284 total flights analyzed, the 86.7% on-time figure is statistically meaningful rather than a small-sample fluke. The 60.2-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, Feb 2024 posted the best performance on this corridor at 93% on-time, while Jun 2025 came in at 64% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the ATL to GSP route, the combination of a 86.7% on-time rate, 60.2-minute average delay, 0.9% recent cancellation rate, and 15 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.