Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
F9 3121 · Charlotte (CLT) → Houston (IAH)
Sold by Frontier. Still flying: 3 of the last 56 days.
Arrives on time77%within 15 minutes, of 174 flights
Cancelled4.6%of scheduled flights
An hour or more late10%of flights that operated
When late, on average69 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Houston is 1 h behind Charlotte).
- Leaves CLT
- 17:58
- Arrives IAH
- 20:32
- Flight time
- 3h 34m
- Days flown, last 8 weeks
- 3 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 CLT
All flights leaving Charlotte (CLT) at 5–6 pm, wherever they’re going: 73% left within 15 minutes and 2.5% were cancelled (13,413 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.