About 1 in 2 UA 1828 flights from Chicago arrived 15+ minutes late, diverted or cancelled over the past year (42%); 3.7% were cancelled. The typical flight landed 7 minutes late.
UA 1828: ORD → SMF
Scheduled to leave Chicago at 8:04 p.m. local time. Over the past year it arrived on time 58% of the time (245 flights), in line with other UA flights on the route at that hour (60%). Last seen in the data Aug 10, 2026.
Usually United Airlines's last flight of the day from Chicago to Sacramento (99% of days). United Airlines's last ORD–SMF flight was cancelled 2.5% of the time, against 0.8% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 9:04 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 37 | 59% |
| Tuesday | 32 | 63% |
| Wednesday | 33 | 55% |
| Thursday | 35 | 51% |
| Friday | 36 | 56% |
| Saturday | 35 | 69% |
| Sunday | 37 | 54% |
Why it was late
All flights ORD → SMF · Connecting off UA 1828? Check the risk
Questions
How often is UA 1828 from ORD to SMF late?
United Airlines 1828 from Chicago, IL to Sacramento, CA arrived 15 or more minutes late, was diverted or was cancelled on 42% of 245 scheduled flights between September 2025 and August 2026. 3.7% 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.