UAL421
- Airline
- United Airlines (UAL)
- Route
- Washington Dulles International Airport (IAD/KIAD) → Chicago O'Hare International Airport (ORD/KORD)
- Observed take-off
- Observed landing
- Aircraft
- N36472 · BOEING 737-900
- Positions recorded
- 3948
- Time airborne
- 86 min
Source: observations by the map.flights community network of ADS-B receivers; times in UTC.