About 1 in 5 UA 4318 flights from Jackson arrived 15+ minutes late, diverted or cancelled over the past year (21%); 0.3% were cancelled. The typical flight landed 8 minutes early.
UA 4318: JAN → IAH
Scheduled to leave Jackson at 7:00 a.m. local time, operated by CommutAir as C5 4318. Over the past year it arrived on time 79% of the time (331 flights), in line with other UA flights on the route at that hour (78%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 88% |
| Tuesday | 48 | 69% |
| Wednesday | 46 | 85% |
| Thursday | 46 | 89% |
| Friday | 47 | 79% |
| Saturday | 47 | 79% |
| Sunday | 48 | 69% |
Why it was late
All flights JAN → IAH · Connecting off UA 4318? Check the risk
Questions
How often is UA 4318 from JAN to IAH late?
United Airlines 4318 from Jackson/Vicksburg, MS to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 21% of 331 scheduled flights between September 2025 and August 2026. 0.3% 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.