C
Is Frontier Airlines on time Ontario to Denver?
552 flights · January 2025 – August 2026 · all airlines on ONT to DEN →
80.11%
Arrived on time
Route average 79.71%
0.72%
Cancelled
Route average 0.45%
98 min
When late, late by
The other airlines on this route
| Airline | Flights | On time | Grade |
|---|---|---|---|
| Southwest Airlines | 1,267 | 75.89% | C |
| United Airlines | 853 | 85.11% | B |
Month by month
Jul 2025
peak 93
Jun 2026