About 1 in 6 UA 4839 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (16%); 0.6% were cancelled. The typical flight landed 12 minutes early.
UA 4839: IAH → AMA
Scheduled to leave Houston at 8:35 p.m. local time, operated by CommutAir as C5 4839. Over the past year it arrived on time 84% of the time (360 flights), in line with other UA flights on the route at that hour (84%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Houston to Amarillo (100% of days). United Airlines's last IAH–AMA flight was cancelled 0.5% of the time, against 0.6% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 9:35 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 87% |
| Tuesday | 52 | 87% |
| Wednesday | 50 | 90% |
| Thursday | 50 | 84% |
| Friday | 52 | 77% |
| Saturday | 51 | 84% |
| Sunday | 52 | 79% |
Why it was late
All flights IAH → AMA · Connecting off UA 4839? Check the risk
Questions
How often is UA 4839 from IAH to AMA late?
United Airlines 4839 from Houston, TX to Amarillo, TX arrived 15 or more minutes late, was diverted or was cancelled on 16% of 360 scheduled flights between September 2025 and August 2026. 0.6% 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.