About 1 in 4 UA 4001 flights from Midland arrived 15+ minutes late, diverted or cancelled over the past year (27%); 1.8% were cancelled. The typical flight landed 4 minutes early.
UA 4001: MAF → IAH
Scheduled to leave Midland at 5:13 p.m. local time, operated by Mesa Airlines as YV 4001. Over the past year it arrived on time 73% of the time (165 flights), in line with other UA flights on the route at that hour (76%). Last seen in the data Aug 10, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 26 | 77% |
| Tuesday | 24 | 79% |
| Wednesday | 24 | 88% |
| Thursday | 23 | 74% |
| Friday | 24 | 58% |
| Saturday | 18 | — |
| Sunday | 26 | 73% |
Why it was late
All flights MAF → IAH · Connecting off UA 4001? Check the risk
Questions
How often is UA 4001 from MAF to IAH late?
United Airlines 4001 from Midland/Odessa, TX to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 27% of 165 scheduled flights between September 2025 and August 2026. 1.8% 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.