Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
F9 4369 · Knoxville (TYS) → Denver (DEN)
Sold by Frontier. Still flying: 24 of the last 56 days (Mon, Wed, Fri).
Arrives on time76%within 15 minutes, of 131 flights
Cancelled0.0%of scheduled flights
An hour or more late11%of flights that operated
When late, on average90 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Denver is 2 h behind Knoxville).
- Leaves TYS
- 20:26
- Arrives DEN
- 21:52
- Flight time
- 3h 26m
- Days flown, last 8 weeks
- 24 of 56
Each square is a day, Sat Jun 6 to Fri Jul 31, two weeks per row (each column is the same weekday); filled = flew.
How late it arrives
Share of flights that operated arriving more than this late.
Horizontal: minutes late at arrival (0 to 3 hours). Vertical: share of flights later than that.
Its hour at TYS
All flights leaving Knoxville (TYS) at 8–9 pm, wherever they’re going: 64% left within 15 minutes and 4.4% were cancelled (316 flights in the year). Other Frontier flights on this route →
Upcoming forecasts
Our odds that this flight is late or cancelled on the days we publish.