About 1 in 14 UA 4000 flights from Lafayette arrived 15+ minutes late, diverted or cancelled over the past year (7%); 0.4% were cancelled. The typical flight landed 18 minutes early.
UA 4000: LFT → IAH
Scheduled to leave Lafayette at 5:15 a.m. local time, operated by Mesa Airlines as YV 4000. Over the past year it arrived on time 93% of the time (231 flights), in line with other UA flights on the route at that hour (91%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 36 | 97% |
| Tuesday | 36 | 92% |
| Wednesday | 25 | 88% |
| Thursday | 35 | 100% |
| Friday | 35 | 89% |
| Saturday | 31 | 94% |
| Sunday | 33 | 91% |
Why it was late
All flights LFT → IAH · Connecting off UA 4000? Check the risk
Questions
How often is UA 4000 from LFT to IAH late?
United Airlines 4000 from Lafayette, LA to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 7% of 231 scheduled flights between September 2025 and August 2026. 0.4% 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.