Flight F91230
Frontier Airlines flight F91230
Looking for F91230 in the air…
Alerts at this flight's airports
San Francisco (SFO) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 11% of the time, and when it is late the delay averages 63 minutes. It was cancelled 1.7% of the time.
- On-time arrivals
- 89.1%
- Less than 15 minutes late
- Cancelled
- 1.7%
- Of scheduled flights
- Average delay when late
- 63 min
- Flights arriving 15+ minutes late
- Flights tracked
- 346
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 63%
- Air traffic control & airport 25%
- Late-arriving aircraft 12%
- Extreme weather 0%
- 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 | 84.6% | 26 |
| October 2025 | 86.7% | 30 |
| November 2025 | 93.3% | 30 |
| December 2025 | 83.9% | 31 |
| January 2026 | 96.0% | 25 |
| February 2026 | 81.8% | 22 |
| March 2026 | 89.3% | 29 |
| April 2026 | 92.9% | 30 |
| May 2026 | 93.5% | 31 |
| June 2026 | 90.0% | 30 |
| July 2026 | 87.1% | 31 |
| August 2026 | 89.3% | 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