United UA4921 Flight Status Tracker
UA4921 is a domestic flight operated by United. UA4921 is departing from Washington (IAD), United States and arriving at Knoxville (TYS), United States. The flight distance is about 676.29 km or 420.23 miles and flight time is 1 hours 39 minutes. Get the latest status of UA4921 / UAL4921 here.
Update on Dec. 17, 2025, 6:14 a.m.
Lastest Status
N/A
| IAD | TYS |
Distance: 676.29 km / 420.23 miles or 365.17 nautical miles.
Departure Washington Dulles Airport
Scheduled Departure: 12:35 p.m.
Departure Terminal : N/A Gate None
Arrival Knoxville Airport
Scheduled Arrival: 1:30 p.m.
Arrival Terminal : C Gate None
Flight UA4921 detail information
| Type | Domestic Flight |
| Route | Departure Washington (IAD), United States and arriving at Knoxville (TYS), United States |
| Airlines | United (UA) |
| Aircraft | E45X |
| Flight Duration | 1 hours 39 minutes |
| Flight Distance | 676.29 km /420.23 miles |
| Operating Days | Monday, Thursday, Friday, Sunday |
Find more flight status
UA4921 Airports
| Departures |
|---|
| Airport: Washington Dulles Airport, United States |
| ICAO Code: IAD |
| IAD Current time: 23:03 23-Feb-2026 |
| Arrivals |
| Airport: Knoxville Airport, United States |
| ICAO Code: TYS |
| TYS Current time: 23:03 23-Feb-2026 |