About 1 in 5 UA 4989 flights from Mobile arrived 15+ minutes late, diverted or cancelled over the past year (18%); 1.3% were cancelled. The typical flight landed 12 minutes early.
UA 4989: MOB → IAH
Scheduled to leave Mobile at 9:00 a.m. local time, operated by CommutAir as C5 4989. Over the past year it arrived on time 82% of the time (230 flights), worse than other UA flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 34 | 88% |
| Tuesday | 31 | 84% |
| Wednesday | 34 | 88% |
| Thursday | 34 | 82% |
| Friday | 34 | 82% |
| Saturday | 34 | 79% |
| Sunday | 29 | 66% |
Why it was late
All flights MOB → IAH · Connecting off UA 4989? Check the risk
Questions
How often is UA 4989 from MOB to IAH late?
United Airlines 4989 from Mobile, AL to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 18% of 230 scheduled flights between September 2025 and August 2026. 1.3% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.