Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
UA 4578 · Knoxville (TYS) → Chicago (ORD)
Sold by United, flown by GoJet. Still flying: 19 of the last 56 days.
Arrives on time83%within 15 minutes, of 35 flights
Cancelled0.0%of scheduled flights
An hour or more late6%of flights that operated
When late, on average58 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Chicago is 1 h behind Knoxville).
- Leaves TYS
- 10:20
- Arrives ORD
- 11:23
- Flight time
- 2h 03m
- Days flown, last 8 weeks
- 19 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 10–11 am, wherever they’re going: 85% left within 15 minutes and 1.3% were cancelled (1,220 flights in the year). Other United flights on this route →
Upcoming forecasts
This flight isn’t in our published forecasts for the next few days.