Washington to Greer

What the Data Says About DCA to GSP

The Washington to Greer corridor (DCA → GSP) covers roughly 396 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 4,568 flights in the dataset, this route posts a 76% on-time rate with an average delay of 77.6 minutes when flights run late. Over the most recent 24 months of BTS data, 2,000 flights were recorded on this pairing — 77 cancelled (3.9%) and 5 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 8 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 4,568 total flights analyzed, the 76% on-time figure is statistically meaningful rather than a small-sample fluke. The 77.6-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 86% on-time, while Dec 2025 came in at 54% on-time — a 32-point gap between best and worst recent month. For travelers evaluating the DCA to GSP route, the combination of a 76% on-time rate, 77.6-minute average delay, 3.9% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.