About 1 in 5 UA 1583 flights from Las Vegas arrived 15+ minutes late, diverted or cancelled over the past year (21%); 0.0% were cancelled. The typical flight landed 8 minutes early.
UA 1583: LAS → ORD
Scheduled to leave Las Vegas at 10:25 a.m. local time. Over the past year it arrived on time 79% of the time (310 flights), worse than other UA flights on the route at that hour (82%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 45 | 78% |
| Tuesday | 44 | 89% |
| Wednesday | 44 | 70% |
| Thursday | 44 | 77% |
| Friday | 44 | 84% |
| Saturday | 44 | 89% |
| Sunday | 45 | 67% |
Why it was late
All flights LAS → ORD · Connecting off UA 1583? Check the risk
UA 1583: ORD → RIC
Scheduled to leave Chicago at 6:10 p.m. local time. Over the past year it arrived on time 60% of the time (159 flights), in line with other UA flights on the route at that hour (58%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Chicago to Richmond (52% of days). United Airlines's last ORD–RIC flight was cancelled 3.8% of the time, against 1.0% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 7:43 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 24 | 54% |
| Tuesday | 22 | 59% |
| Wednesday | 21 | 48% |
| Thursday | 22 | 55% |
| Friday | 23 | 70% |
| Saturday | 23 | 70% |
| Sunday | 24 | 63% |
Why it was late
All flights ORD → RIC · Connecting off UA 1583? Check the risk
Questions
How often is UA 1583 from LAS to ORD late?
United Airlines 1583 from Las Vegas, NV to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 21% of 310 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is UA 1583 from ORD to RIC late?
United Airlines 1583 from Chicago, IL to Richmond, VA arrived 15 or more minutes late, was diverted or was cancelled on 40% of 159 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.