Twin Falls to Salt Lake City

What the Data Says About TWF to SLC

The Twin Falls to Salt Lake City corridor (TWF → SLC) covers roughly 175 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 4,062 flights in the dataset, this route posts a 92.9% on-time rate with an average delay of 107.8 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 4,062 total flights analyzed, the 92.9% on-time figure is statistically meaningful rather than a small-sample fluke. The 107.8-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, Sep 2025 posted the best performance on this corridor at 100% on-time, while Feb 2025 came in at 82% on-time — a 18-point gap between best and worst recent month. For travelers evaluating the TWF to SLC route, the combination of a 92.9% on-time rate, 107.8-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.