Salt Lake City to Twin Falls

What the Data Says About SLC to TWF

The Salt Lake City to Twin Falls corridor (SLC → TWF) covers roughly 175 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 4,004 flights in the dataset, this route posts a 91.6% on-time rate with an average delay of 89.9 minutes when flights run late. Over the most recent 24 months of BTS data, 1,416 flights were recorded on this pairing — 2 cancelled (0.1%) and 1 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 4,004 total flights analyzed, the 91.6% on-time figure is statistically meaningful rather than a small-sample fluke. The 89.9-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, Sep 2025 posted the best performance on this corridor at 100% on-time, while Dec 2024 came in at 84% on-time — a 16-point gap between best and worst recent month. For travelers evaluating the SLC to TWF route, the combination of a 91.6% on-time rate, 89.9-minute average delay, 0.1% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.