Atlanta to Harrisburg

What the Data Says About ATL to MDT

The Atlanta to Harrisburg corridor (ATL → MDT) covers roughly 620 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 5,417 flights in the dataset, this route posts a 89.2% on-time rate with an average delay of 65.8 minutes when flights run late. Over the most recent 24 months of BTS data, 1,955 flights were recorded on this pairing — 17 cancelled (0.9%) 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 5,417 total flights analyzed, the 89.2% on-time figure is statistically meaningful rather than a small-sample fluke. The 65.8-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 97% on-time, while Jun 2025 came in at 68% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the ATL to MDT route, the combination of a 89.2% on-time rate, 65.8-minute average delay, 0.9% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.