Route · BOI → SLC · 2020–2025 BTS data
Boise to Salt Lake City
The BOI–SLC corridor (Boise, ID → Salt Lake City, UT) runs ahead of the national average, served by 4 carriers across roughly 290 miles.
Data updated 2026-06-13
- 90.1%
- On-time
- +11.1 pts
- vs US avg
- 87 min
- Delay when late
- 10,117
- Flights
Cancelled
0.6%
Best Month
Jul 2025 96%
Worst Month
Jan 2024 67%
Distance
290 mi
Carriers
4
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 149 | 15 | 4 | 0 | DL,OO |
| Nov 2025 | 147 | 8 | 6 | 0 | OO,DL |
| Oct 2025 | 155 | 12 | 0 | 0 | DL,OO |
| Sep 2025 | 150 | 13 | 0 | 0 | OO,DL |
| Aug 2025 | 155 | 13 | 0 | 1 | OO,DL |
| Jul 2025 | 149 | 6 | 0 | 0 | OO,DL |
| Jun 2025 | 147 | 10 | 2 | 0 | OO,DL |
| May 2025 | 148 | 9 | 0 | 0 | DL |
| Apr 2025 | 136 | 12 | 0 | 0 | DL |
| Mar 2025 | 138 | 15 | 0 | 0 | DL |
| Feb 2025 | 112 | 19 | 0 | 0 | OO,DL |
| Jan 2025 | 127 | 16 | 1 | 0 | OO,DL |
| Dec 2024 | 147 | 27 | 0 | 0 | DL,OO |
| Nov 2024 | 135 | 11 | 0 | 0 | OO,DL |
| Oct 2024 | 146 | 12 | 0 | 0 | OO,DL |
| Sep 2024 | 139 | 9 | 0 | 0 | OO,DL |
| Aug 2024 | 133 | 19 | 1 | 0 | DL |
| Jul 2024 | 144 | 30 | 6 | 0 | DL,OO |
| Jun 2024 | 144 | 20 | 0 | 0 | DL,OO |
| May 2024 | 150 | 21 | 0 | 0 | DL,OO |
| Apr 2024 | 146 | 14 | 0 | 0 | DL,OO |
| Mar 2024 | 143 | 15 | 0 | 0 | DL,OO |
| Feb 2024 | 116 | 15 | 0 | 0 | DL |
| Jan 2024 | 129 | 43 | 0 | 0 | DL,OO |
Cancellation Rate
0.6%
20 of 3,385 flights
Diversion Rate
0.0%
1 of 3,385 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BOI - Boise
Full on-time, delay-cause, and seasonal performance for Boise, ID.
Origin airport →SLC - Salt Lake City
Full on-time, delay-cause, and seasonal performance for Salt Lake City, UT.
Destination airport →Compare the two airports
See BOI and SLC side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to BOI–SLC.
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What the Data Says About BOI to SLC
Boise to Salt Lake City (BOI to SLC) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 90.1% on-time rate across 10,117 flights, with delays that do happen averaging 87.4 minutes. The corridor runs roughly 290 miles and is served by 4 carriers. Over the most recent 24 months, 20 of 3,385 flights were cancelled (0.6%) and 1 diverted (0.0%).
The monthly split is wide on this route: Jul 2025 posted the strongest performance at 96% on-time, while Jan 2024 came in at just 67% - a 29-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.