C
Is Southwest Airlines on time Ontario to Denver?
1,267 flights · January 2025 – August 2026 · all airlines on ONT to DEN →
75.89%
Arrived on time
Route average 79.71%
0.39%
Cancelled
Route average 0.45%
53 min
When late, late by
The other airlines on this route
| Airline | Flights | On time | Grade |
|---|---|---|---|
| United Airlines | 853 | 85.11% | B |
| Frontier Airlines | 552 | 80.11% | C |
Month by month
Jul 2025
peak 84
Jun 2026