Twin Falls, ID

What the Data Says About TWF

Twin Falls, ID in Twin Falls, Idaho handled 8,708 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 92.3% on-time departure rate. Of those flights, 670 experienced delays, 25 were cancelled, and 6 were diverted. The cancellation rate works out to 0.29%, the diversion rate to 0.07%, and the average delay when departures run late is 103.1 minutes. These figures are the baseline for comparing TWF against other airports in the same state and nationally.

Breaking down what drives delays at TWF, Carrier leads the pack. Carrier accounts for 61.6% of total delay minutes, followed by Weather at 29.0% and NAS (National Aviation System) at 6.6%. Weather contributes 29.0% 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, September runs the cleanest at TWF with a 98.2% on-time rate, while January is the roughest at 94% — a 4-point swing between best and worst month. Volume peaks in October, when average flights hit 135. The busiest route from TWF is to SLC (Salt Lake City), with 4,062 flights at a 92.9% on-time rate. Combine these numbers — 92.3% on-time, 103.1-minute average delay, 0.29% cancellation rate — and you have a concrete picture of departure reliability at Twin Falls, ID.