Flight F91261
Frontier Airlines flight F91261
Looking for F91261 in the air…
Denver (DEN) to Ontario (ONT)
Historically, this flight arrives 15+ minutes late 23% of the time, and when it is late the delay averages 72 minutes. It was cancelled 0.7% of the time.
- On-time arrivals
- 76.9%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 270
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 51%
- Late-arriving aircraft 40%
- Air traffic control & airport 7%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 94.1% | 17 |
| October 2025 | 88.9% | 18 |
| November 2025 | 90.9% | 22 |
| December 2025 | 100.0% | 11 |
| January 2026 | 91.7% | 12 |
| February 2026 | 77.8% | 9 |
| March 2026 | 78.6% | 28 |
| April 2026 | 90.0% | 30 |
| May 2026 | 67.7% | 31 |
| June 2026 | 50.0% | 30 |
| July 2026 | 64.5% | 31 |
| August 2026 | 69.0% | 31 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data