Route · SLC → ONT · 2020–2025 BTS data
Salt Lake City to Ontario
The SLC–ONT corridor (Salt Lake City, UT → Ontario, CA) runs ahead of the national average, served by 8 carriers across roughly 558 miles.
Data updated 2026-06-13
- 89.4%
- On-time
- +10.4 pts
- vs US avg
- 66 min
- Delay when late
- 7,788
- Flights
Cancelled
0.7%
Best Month
Jan 2025 95%
Worst Month
Sep 2024 80%
Distance
558 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 90 | 12 | 0 | 0 | DL,OO |
| Nov 2025 | 88 | 8 | 3 | 0 | OO,DL |
| Oct 2025 | 115 | 10 | 0 | 0 | OO,DL |
| Sep 2025 | 110 | 10 | 0 | 0 | OO,DL |
| Aug 2025 | 118 | 10 | 1 | 0 | OO,DL |
| Jul 2025 | 116 | 12 | 0 | 0 | DL,OO |
| Jun 2025 | 114 | 17 | 1 | 0 | DL,OO |
| May 2025 | 113 | 8 | 0 | 0 | DL,OO |
| Apr 2025 | 90 | 6 | 0 | 0 | DL,OO |
| Mar 2025 | 91 | 13 | 0 | 0 | DL,OO |
| Feb 2025 | 81 | 12 | 0 | 0 | DL,OO,F9 |
| Jan 2025 | 97 | 5 | 0 | 1 | DL,OO,F9 |
| Dec 2024 | 94 | 7 | 0 | 1 | DL,F9,OO |
| Nov 2024 | 88 | 6 | 0 | 0 | OO,DL |
| Oct 2024 | 94 | 5 | 0 | 0 | OO,DL,F9 |
| Sep 2024 | 99 | 20 | 0 | 0 | OO,DL,F9 |
| Aug 2024 | 110 | 11 | 1 | 0 | DL,F9,OO |
| Jul 2024 | 123 | 21 | 8 | 0 | DL,F9,OO |
| Jun 2024 | 119 | 14 | 2 | 0 | DL,F9,OO |
| May 2024 | 118 | 16 | 0 | 0 | DL,F9,OO |
| Apr 2024 | 107 | 20 | 1 | 0 | DL,F9,OO |
| Mar 2024 | 88 | 12 | 0 | 0 | DL,OO |
| Feb 2024 | 78 | 5 | 0 | 0 | DL,OO |
| Jan 2024 | 95 | 19 | 0 | 0 | DL,OO |
Cancellation Rate
0.7%
17 of 2,436 flights
Diversion Rate
0.1%
2 of 2,436 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SLC - Salt Lake City
Full on-time, delay-cause, and seasonal performance for Salt Lake City, UT.
Origin airport →ONT - Ontario
Full on-time, delay-cause, and seasonal performance for Ontario, CA.
Destination airport →Compare the two airports
See SLC and ONT side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SLC–ONT.
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What the Data Says About SLC to ONT
Salt Lake City to Ontario (SLC to ONT) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 89.4% on-time rate across 7,788 flights, with delays that do happen averaging 66.3 minutes. The corridor runs roughly 558 miles and is served by 8 carriers. Over the most recent 24 months, 17 of 2,436 flights were cancelled (0.7%) and 2 diverted (0.1%).
The monthly split is wide on this route: Jan 2025 posted the strongest performance at 95% on-time, while Sep 2024 came in at just 80% - a 15-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.