Flight Reliability
F9 4369 · Frontier Airlines
Knoxville → Denver (TYS–DEN)
79
Usually Fine
WanderNerd Reliability Score
- 72%
- Arrive within 15 minutes
- 13 min
- Average arrival delay
- 0%
- Cancelled
- 7 min early
- Median arrival delay
Based on 123 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
F9 4369 departing between 6–9 PM arrived on time 80% of the time, versus 68% between 3–6 PM.
Thursday is the weak spot.
F9 4369 arrived on time 76% of the time on Fridays. On Thursdays: 65%.
Lagging the TYS–DEN route.
F9 4369 arrived on time 72% of the time, versus 84% across the TYS–DEN route.
It basically never cancels.
Out of 123 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon75%(28 flights)
- Tue—(3 flights)
- Wed—(0 flights)
- Thu65%(34 flights)
- Fri76%(21 flights)
- Sat—(2 flights)
- Sun71%(35 flights)
- 3–6 PM68%(74 flights)
- 6–9 PM80%(49 flights)
70%
Jan
Sep 83% → Jan 70% on time
| Month | On-time percentage | Flights |
|---|---|---|
| September 2025 | 83% | 12 |
| October 2025 | 56% | 16 |
| November 2025 | 100% | 10 |
| December 2025 | 93% | 14 |
| January 2026 | 70% | 10 |
- Departures on time
- 72%
- Diverted
- 0%
- Flights flown
- 123
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 123 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.