About 1 in 15 UA 1966 flights from Austin arrived 15+ minutes late, diverted or cancelled over the past year (7%); 1.8% were cancelled. The typical flight landed 14 minutes early.
UA 1966: AUS → IAH
Scheduled to leave Austin at 5:30 a.m. local time. Over the past year it arrived on time 93% of the time (327 flights), in line with other UA flights on the route at that hour (94%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 90% |
| Tuesday | 44 | 91% |
| Wednesday | 47 | 94% |
| Thursday | 49 | 98% |
| Friday | 47 | 100% |
| Saturday | 49 | 94% |
| Sunday | 42 | 86% |
Why it was late
All flights AUS → IAH · Connecting off UA 1966? Check the risk
UA 1966: IAH → MIA
Scheduled to leave Houston at 7:25 a.m. local time. Over the past year it arrived on time 89% of the time (163 flights), in line with other UA flights on the route at that hour (90%). Last seen in the data Aug 10, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 26 | 96% |
| Tuesday | 17 | — |
| Wednesday | 17 | — |
| Thursday | 26 | 92% |
| Friday | 25 | 88% |
| Saturday | 26 | 81% |
| Sunday | 26 | 85% |
Why it was late
All flights IAH → MIA · Connecting off UA 1966? Check the risk
Questions
How often is UA 1966 from AUS to IAH late?
United Airlines 1966 from Austin, TX to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 7% of 327 scheduled flights between September 2025 and August 2026. 1.8% were cancelled.
How often is UA 1966 from IAH to MIA late?
United Airlines 1966 from Houston, TX to Miami, FL arrived 15 or more minutes late, was diverted or was cancelled on 11% of 163 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.