Route Reliability
Phoenix → Ontario
PHX–ONT · 325 miles · Phoenix Sky Harbor International Airport to Ontario International Airport
- 78%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.5%
- Cancelled
- 3,095
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.American Airlines81%1,487 flights
- 2.Southwest Airlines76%1,608 flights
What the data says
Morning flights do better here.
PHX–ONT flights departing between 6–9 AM arrived on time 93% of the time, versus 65% between 9 PM–12 AM.
Sunday scaries are real for this one.
PHX–ONT flights arrived on time 84% of the time on Tuesdays. On Sundays: 74%.
American Airlines has a slight edge here.
American Airlines arrived on time 81% of the time on this route; Southwest Airlines managed 76%.
Slipping a little lately.
PHX–ONT flights arrived on time 77% of the time over the last three months in the data, compared with 82% 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
- Mon78%(471 flights)
- Tue84%(432 flights)
- Wed80%(432 flights)
- Thu78%(470 flights)
- Fri74%(461 flights)
- Sat80%(360 flights)
- Sun74%(455 flights)
- 6–9 AM93%(441 flights)
- 9 AM–12 PM87%(685 flights)
- 12–3 PM80%(357 flights)
- 3–6 PM76%(679 flights)
- 6–9 PM66%(609 flights)
- 9 PM–12 AM65%(310 flights)
Jun 71% → May 72% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 71% | 260 |
| July 2025 | 78% | 262 |
| August 2025 | 82% | 237 |
| September 2025 | 79% | 224 |
| October 2025 | 79% | 258 |
| November 2025 | 76% | 266 |
| December 2025 | 78% | 281 |
| January 2026 | 85% | 259 |
| February 2026 | 84% | 240 |
| March 2026 | 80% | 288 |
| April 2026 | 78% | 252 |
| May 2026 | 72% | 254 |
Same trip, other airports
Keep nerding
Based on 3,095 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.