Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
F9 4391 · Detroit (DTW) → Phoenix (PHX)
Sold by Frontier. Still flying: 1 of the last 56 days.
Arrives on time67%within 15 minutes, of 83 flights
Cancelled2.4%of scheduled flights
An hour or more late15%of flights that operated
When late, on average137 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Phoenix is 3 h behind Detroit).
- Leaves DTW
- 19:44
- Arrives PHX
- 20:53
- Flight time
- 4h 09m
- Days flown, last 8 weeks
- 1 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 DTW
All flights leaving Detroit (DTW) at 7–8 pm, wherever they’re going: 71% left within 15 minutes and 2.0% were cancelled (7,607 flights in the year). Other Frontier flights on this route →
Upcoming forecasts
This flight isn’t in our published forecasts for the next few days.