Flight F91790
Frontier Airlines flight F91790
Looking for F91790 in the air…
Portland (PDX) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 17% of the time, and when it is late the delay averages 55 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 82.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 55 min
- Flights arriving 15+ minutes late
- Flights tracked
- 231
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 42%
- Air traffic control & airport 36%
- Airline (crew, maintenance, cleaning) 20%
- Extreme weather 1%
- 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 | 63.3% | 30 |
| October 2025 | 80.0% | 30 |
| November 2025 | 100.0% | 23 |
| December 2025 | 73.3% | 15 |
| January 2026 | 50.0% | 8 |
| March 2026 | 80.0% | 15 |
| April 2026 | 85.7% | 21 |
| May 2026 | 90.9% | 22 |
| June 2026 | 100.0% | 22 |
| July 2026 | 86.4% | 22 |
| August 2026 | 85.7% | 23 |
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