Route Reliability
Ontario → Salt Lake City
ONT–SLC · 558 miles · Ontario International Airport to Salt Lake City International Airport
- 92%
- Arrive within 15 minutes
- 5 min early
- Average arrival delay
- 1.0%
- Cancelled
- 1,240
- Flights in the data
Data through May 2026.
Airlines on this route
- Delta Air Lines92% on time · 1,210 flights
- Frontier Airlines90% 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
Morning flights do better here.
ONT–SLC flights departing between 9 AM–12 PM arrived on time 97% of the time, versus 86% between 12–3 PM.
Wednesday comes out ahead.
A small edge: 94% on time on Wednesdays against 88% on Thursdays.
Ticking up lately.
ONT–SLC flights arrived on time 93% of the time over the last three months in the data, compared with 87% 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
- Mon90%(180 flights)
- Tue93%(177 flights)
- Wed94%(175 flights)
- Thu88%(184 flights)
- Fri92%(184 flights)
- Sat92%(142 flights)
- Sun94%(185 flights)
- 6–9 AM96%(366 flights)
- 9 AM–12 PM97%(161 flights)
- 12–3 PM86%(360 flights)
- 3–6 PM92%(336 flights)
- 6–9 PM—(4 flights)
Jun 94% → May 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 94% | 113 |
| July 2025 | 91% | 116 |
| August 2025 | 96% | 117 |
| September 2025 | 91% | 110 |
| October 2025 | 94% | 115 |
| November 2025 | 94% | 85 |
| December 2025 | 86% | 90 |
| January 2026 | 87% | 90 |
| February 2026 | 89% | 89 |
| March 2026 | 88% | 90 |
| April 2026 | 94% | 98 |
| May 2026 | 97% | 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.