About 1 in 6 UA 6166 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (16%); 1.4% were cancelled. The typical flight landed 7 minutes early.
UA 6166: IAH → DSM
Scheduled to leave Houston at 11:55 a.m. local time, operated by Mesa Airlines as YV 6166. Over the past year it arrived on time 84% of the time (364 flights), in line with other UA flights on the route at that hour (83%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 79% |
| Tuesday | 52 | 87% |
| Wednesday | 52 | 81% |
| Thursday | 51 | 88% |
| Friday | 52 | 83% |
| Saturday | 52 | 92% |
| Sunday | 52 | 77% |
Why it was late
All flights IAH → DSM · Connecting off UA 6166? Check the risk
Questions
How often is UA 6166 from IAH to DSM late?
United Airlines 6166 from Houston, TX to Des Moines, IA arrived 15 or more minutes late, was diverted or was cancelled on 16% of 364 scheduled flights between September 2025 and August 2026. 1.4% 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.