Is UAL4521 delayed?
Service date: · Scheduled departure date (UTC)
Arrived
2 min late
Official source · Updated
Departure
Fayetteville/Springdale/
XNA
Actual
Scheduled 17:01
Sep 7
Arrival
Houston
IAH
Actual
Scheduled 13:23
Sep 7
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
XNAIAH
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 18 min late
XNA → IAH
- 1 min late
XNA → IAH
- 16 min late
XNA → IAH
- 13 min early
XNA → IAH
- 12 min early
XNA → IAH
Flight history and details
Aug 21, 2026 — Sep 20, 2026
- Observed arrivals
- 14
- Arrivals over 15 minutes late
- 3
- Observed cancellations
- 1
- Observed occurrences
- 15
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 19, 2026Arrived | Fayetteville/Springdale/ | Houston | 18 | |
| Sep 18, 2026Cancelled | Fayetteville/Springdale/ | Houston | Not available | Not available |
| Sep 17, 2026Arrived | Fayetteville/Springdale/ | Houston | 1 | |
| Sep 16, 2026Arrived | Fayetteville/Springdale/ | Houston | 16 | |
| Sep 14, 2026Arrived | Fayetteville/Springdale/ | Houston | -13 | |
| Sep 13, 2026Arrived | Fayetteville/Springdale/ | Houston | -12 | |
| Sep 12, 2026Arrived | Fayetteville/Springdale/ | Houston | -16 | |
| Sep 11, 2026Arrived | Fayetteville/Springdale/ | Houston | -14 | |
| Sep 10, 2026Arrived | Fayetteville/Springdale/ | Houston | -9 | |
| Sep 9, 2026Arrived | Fayetteville/Springdale/ | Houston | -13 | |
| Sep 8, 2026Arrived | Fayetteville/Springdale/ | Houston | -9 | |
| Sep 7, 2026Arrived | Fayetteville/Springdale/ | Houston | 2 | |
| Sep 6, 2026Arrived | Fayetteville/Springdale/ | Houston | -2 | |
| Sep 5, 2026Arrived | Fayetteville/Springdale/ | Houston | 80 | |
| Sep 4, 2026Arrived | Fayetteville/Springdale/ | Houston | 4 |