Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
F9 1279 · Miami (MIA) → Denver (DEN)
Sold by Frontier. Still flying: 56 of the last 56 days (Daily).
Arrives on time85%within 15 minutes, of 335 flights
Cancelled1.2%of scheduled flights
An hour or more late6%of flights that operated
When late, on average125 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 Miami).
- Leaves MIA
- 06:00
- Arrives DEN
- 08:37
- Flight time
- 4h 27m
- Days flown, last 8 weeks
- 56 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 MIA
All flights leaving Miami (MIA) at 6–7 am, wherever they’re going: 92% left within 15 minutes and 1.6% were cancelled (5,463 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.