UAL421

Airline

United Airlines (UAL)

Route

Washington Dulles International Airport (IAD/KIAD) → Chicago O'Hare International Airport (ORD/KORD)

Observed take-off

2026-09-24 03:12 UTC

Observed landing

2026-09-24 04:38 UTC

Aircraft

N36472 · BOEING 737-900

Positions recorded

3948

Time airborne

86 min

Previous flights of UAL421

• UAL421 Denver International Airport (DEN/KDEN) → Washington Dulles International Airport (IAD/KIAD) 2026-09-24 00:42 UTC
• UAL421 Washington Dulles International Airport (IAD/KIAD) → Chicago O'Hare International Airport (ORD/KORD) 2026-09-23 04:39 UTC
• UAL421 Denver International Airport (DEN/KDEN) → Washington Dulles International Airport (IAD/KIAD) 2026-09-23 00:52 UTC
• UAL421 Washington Dulles International Airport (IAD/KIAD) → Chicago O'Hare International Airport (ORD/KORD) 2026-09-22 04:58 UTC
• UAL421 Denver International Airport (DEN/KDEN) → Washington Dulles International Airport (IAD/KIAD) 2026-09-22 00:57 UTC
• UAL421 Washington Dulles International Airport (IAD/KIAD) → Chicago O'Hare International Airport (ORD/KORD) 2026-09-21 05:16 UTC
• UAL421 Denver International Airport (DEN/KDEN) → Washington Dulles International Airport (IAD/KIAD) 2026-09-21 00:50 UTC

Source: observations by the map.flights community network of ADS-B receivers; times in UTC.