Johnstown, PA

What the Data Says About JST

Johnstown, PA in Johnstown, Pennsylvania handled 7,267 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 82.1% on-time departure rate. Of those flights, 1,298 experienced delays, 110 were cancelled, and 4 were diverted. The cancellation rate works out to 1.51%, the diversion rate to 0.06%, and the average delay when departures run late is 142.9 minutes. These figures are the baseline for comparing JST against other airports in the same state and nationally.

Breaking down what drives delays at JST, Late Aircraft leads the pack. Late Aircraft accounts for 45.0% of total delay minutes, followed by Carrier at 39.3% and Weather at 9.8%. Weather contributes 9.8% of delay minutes at this airport, while security holds the smallest share at 0.0%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, May runs the cleanest at JST with a 94.7% on-time rate, while November is the roughest at 88.1% — a 7-point swing between best and worst month. Volume peaks in October, when average flights hit 124. The busiest route from JST is to JST (Johnstown), with 1,559 flights at a 83.4% on-time rate. Combine these numbers — 82.1% on-time, 142.9-minute average delay, 1.51% cancellation rate — and you have a concrete picture of departure reliability at Johnstown, PA.