Is AC4420 delayed?
Service date: · Scheduled departure date (America/New_York)
Arrived
20 min early
Official source · Updated
Departure
Dulles
IAD
Scheduled
Sep 8
Arrival
Chicago
ORD
Actual
Scheduled 23:40
Sep 8
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
Arrival · UTC
- Scheduled
- Estimated
- Actual
Operating flight: UAL421
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 32 min early
IAD → ORD
- 18 min early
IAD → ORD
- 27 min early
IAD → ORD
- 6 min late
IAD → ORD
- 20 min early
IAD → ORD
Flight history and details
Aug 18, 2026 — Sep 17, 2026
- Observed arrivals
- 13
- Arrivals over 15 minutes late
- 0
- Observed cancellations
- 0
- Observed occurrences
- 13
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 16, 2026Arrived | Dulles | Chicago | -32 | |
| Sep 15, 2026Arrived | Dulles | Chicago | -18 | |
| Sep 14, 2026Arrived | Dulles | Chicago | -27 | |
| Sep 13, 2026Arrived | Dulles | Chicago | 6 | |
| Sep 12, 2026Arrived | Dulles | Chicago | -20 | |
| Sep 11, 2026Arrived | Dulles | Chicago | -34 | |
| Sep 10, 2026Arrived | Dulles | Chicago | -24 | |
| Sep 9, 2026Arrived | Dulles | Chicago | -24 | |
| Sep 8, 2026Arrived | Dulles | Chicago | -20 | |
| Sep 7, 2026Arrived | Dulles | Chicago | -28 | |
| Sep 6, 2026Arrived | Dulles | Chicago | 5 | |
| Sep 5, 2026Arrived | Dulles | Chicago | -21 | |
| Sep 4, 2026Arrived | Dulles | Chicago | -1 |