Flight F91229
Frontier Airlines flight F91229
Looking for F91229 in the air…
Alerts at this flight's airports
Denver (DEN) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 39% of the time, and when it is late the delay averages 51 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 60.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 51 min
- Flights arriving 15+ minutes late
- Flights tracked
- 186
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 77%
- Late-arriving aircraft 15%
- Airline (crew, maintenance, cleaning) 6%
- 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 | 88.2% | 17 |
| October 2025 | 72.2% | 18 |
| November 2025 | 85.7% | 21 |
| December 2025 | 82.4% | 17 |
| January 2026 | 88.9% | 9 |
| February 2026 | 100.0% | 10 |
| March 2026 | 100.0% | 4 |
| April 2026 | 80.0% | 10 |
| May 2026 | 57.9% | 19 |
| June 2026 | 10.0% | 30 |
| July 2026 | 8.3% | 12 |
| August 2026 | 42.1% | 19 |
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