United Airlines
Is UA4021 delayed?
Service date: · Scheduled departure date (America/Chicago)
Arrived
28 min early
Official source · Updated
Departure
Houston
IAH
Actual
Scheduled 20:28
Sep 14
Arrival
Memphis
MEM
Actual
Scheduled 02:51
Sep 15
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
IAHMEM
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 28 min early
IAH → MEM
- 7 min late
IAH → MEM
- 2 min early
IAH → MEM
- 54 min late
IAH → MEM
- 16 min early
IAH → MEM
Flight history and details
Aug 17, 2026 — Sep 16, 2026
- Observed arrivals
- 9
- Arrivals over 15 minutes late
- 1
- Observed cancellations
- 1
- Observed occurrences
- 10
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 14, 2026Arrived | Houston | Memphis | -28 | |
| Sep 13, 2026Arrived | Houston | Memphis | 7 | |
| Sep 12, 2026Arrived | Houston | Memphis | -2 | |
| Sep 11, 2026Arrived | Houston | Memphis | 54 | |
| Sep 10, 2026Arrived | Houston | Memphis | -16 | |
| Sep 7, 2026Arrived | Houston | Memphis | -18 | |
| Sep 6, 2026Arrived | Houston | Memphis | -7 | |
| Sep 5, 2026Arrived | Houston | Memphis | 1 | |
| Sep 4, 2026Arrived | Houston | Memphis | -8 | |
| Aug 21, 2026Cancelled | Houston | Memphis | Not available | Not available |