Is UA4427 delayed?
Service date: · Scheduled departure date (America/New_York)
Arrived
22 min early
Official source · Updated
Departure
Dulles
IAD
Actual
Scheduled 08:46
Sep 8
Arrival
St Louis
STL
Actual
Scheduled 14:33
Sep 8
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
IADSTL
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 31 min late
IAD → STL
- 120 min late
IAD → STL
- 5 min early
IAD → STL
- 19 min early
IAD → STL
- 15 min late
IAD → STL
Flight history and details
Aug 19, 2026 — Sep 18, 2026
- Observed arrivals
- 16
- Arrivals over 15 minutes late
- 4
- Observed cancellations
- 0
- Observed occurrences
- 25
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 18, 2026Arrived | Dulles | St Louis | 31 | |
| Sep 17, 2026Arrived | Dulles | St Louis | 120 | |
| Sep 16, 2026Arrived | Dulles | St Louis | -5 | |
| Sep 15, 2026Arrived | Dulles | St Louis | -19 | |
| Sep 13, 2026Arrived | Dulles | St Louis | 15 | |
| Sep 11, 2026Arrived | Dulles | St Louis | -12 | |
| Sep 9, 2026Arrived | Dulles | St Louis | -23 | |
| Sep 8, 2026Arrived | Dulles | St Louis | -22 | |
| Sep 7, 2026Arrived | Dulles | St Louis | -6 | |
| Sep 6, 2026Arrived | Dulles | St Louis | -17 | |
| Sep 5, 2026Arrived | Dulles | St Louis | 22 | |
| Sep 4, 2026Arrived | Dulles | St Louis | -6 | |
| Sep 3, 2026Arrived | Dulles | St Louis | 23 | |
| Aug 30, 2026Arrived | Dulles | St Louis | -22 | |
| Aug 29, 2026Arrived | Dulles | St Louis | -8 | |
| Aug 24, 2026Arrived | Dulles | St Louis | -8 |