Route Reliability
Salt Lake City → Ontario
SLC–ONT · 558 miles · Salt Lake City International Airport to Ontario International Airport
- 89%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 1.0%
- Cancelled
- 1,240
- Flights in the data
Data through May 2026.
Airlines on this route
- Delta Air Lines89% on time · 1,210 flights
- Frontier Airlines93% on time · 30 flights
Too little history on this route to call a winner. We rank airlines only after 100 flights each.
What the data says
The 6–9 AM departure wins.
SLC–ONT flights departing between 6–9 AM arrived on time 95% of the time, versus 86% between 9 AM–12 PM.
Friday comes out ahead.
A small edge: 92% on time on Fridays against 88% on Saturdays.
Ticking up lately.
SLC–ONT flights arrived on time 91% of the time over the last three months in the data, compared with 86% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon89%(182 flights)
- Tue90%(177 flights)
- Wed90%(175 flights)
- Thu88%(184 flights)
- Fri92%(184 flights)
- Sat88%(142 flights)
- Sun89%(183 flights)
- 6–9 AM95%(150 flights)
- 9 AM–12 PM86%(368 flights)
- 12–3 PM—(6 flights)
- 3–6 PM93%(336 flights)
- 6–9 PM92%(37 flights)
- 9 PM–12 AM87%(330 flights)
Jun 86% → May 95% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 86% | 113 |
| July 2025 | 90% | 116 |
| August 2025 | 92% | 117 |
| September 2025 | 91% | 110 |
| October 2025 | 91% | 115 |
| November 2025 | 91% | 85 |
| December 2025 | 88% | 90 |
| January 2026 | 87% | 90 |
| February 2026 | 83% | 89 |
| March 2026 | 89% | 89 |
| April 2026 | 89% | 99 |
| May 2026 | 95% | 114 |
Same trip, other airports
Keep nerding
Based on 1,240 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.