About 1 in 3 UA 1668 flights from Austin arrived 15+ minutes late, diverted or cancelled over the past year (29%); 0.3% were cancelled. The typical flight landed 4 minutes early.
UA 1668: AUS → SFO
Scheduled to leave Austin at 8:45 a.m. local time. Over the past year it arrived on time 71% of the time (361 flights), worse than other UA flights on the route at that hour (86%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 70% |
| Tuesday | 52 | 77% |
| Wednesday | 52 | 77% |
| Thursday | 52 | 58% |
| Friday | 52 | 69% |
| Saturday | 52 | 81% |
| Sunday | 48 | 63% |
Why it was late
All flights AUS → SFO · Connecting off UA 1668? Check the risk
Questions
How often is UA 1668 from AUS to SFO late?
United Airlines 1668 from Austin, TX to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 29% of 361 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.