Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
UA 439 · Austin (AUS) → Denver (DEN)
Sold by United. Still flying: 48 of the last 56 days (Mon, Tue, Wed, Thu, Fri, Sun).
Arrives on time68%within 15 minutes, of 188 flights
Cancelled0.5%of scheduled flights
An hour or more late13%of flights that operated
When late, on average72 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Denver is 1 h behind Austin).
- Leaves AUS
- 18:29
- Arrives DEN
- 20:00
- Flight time
- 2h 31m
- Days flown, last 8 weeks
- 48 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 AUS
All flights leaving Austin (AUS) at 6–7 pm, wherever they’re going: 63% left within 15 minutes and 1.3% were cancelled (5,524 flights in the year). Other United flights on this route →
Upcoming forecasts
Our odds that this flight is late or cancelled on the days we publish.