Flight UA1583
United Airlines flight UA1583
Looking for UA1583 in the airâŚ
Alerts at this flight's airports
Las Vegas (LAS) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 20% of the time, and when it is late the delay averages 74 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 80.1%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 74 min
- Flights arriving 15+ minutes late
- Flights tracked
- 310
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 65%
- Airline (crew, maintenance, cleaning) 15%
- Late-arriving aircraft 15%
- Extreme weather 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Richmond (RIC)
Historically, this flight arrives 15+ minutes late 40% of the time, and when it is late the delay averages 97 minutes. It was cancelled 0.6% of the time.
- On-time arrivals
- 60.1%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 97 min
- Flights arriving 15+ minutes late
- Flights tracked
- 159
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 64%
- Airline (crew, maintenance, cleaning) 17%
- Extreme weather 10%
- Air traffic control & airport 9%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Harrisburg (MDT)
Historically, this flight arrives 15+ minutes late 43% of the time, and when it is late the delay averages 81 minutes. It was cancelled 1.5% of the time.
- On-time arrivals
- 56.9%
- Less than 15 minutes late
- Cancelled
- 1.5%
- Of scheduled flights
- Average delay when late
- 81 min
- Flights arriving 15+ minutes late
- Flights tracked
- 66
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 71%
- Airline (crew, maintenance, cleaning) 15%
- Air traffic control & airport 13%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Baltimore (BWI)
Historically, this flight arrives 15+ minutes late 29% of the time, and when it is late the delay averages 55 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 70.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 55 min
- Flights arriving 15+ minutes late
- Flights tracked
- 55
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Air traffic control & airport 30%
- Airline (crew, maintenance, cleaning) 21%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Knoxville/Maryville (TYS)
Historically, this flight arrives 15+ minutes late 46% of the time, and when it is late the delay averages 64 minutes. It was cancelled 5.4% of the time.
- On-time arrivals
- 54.3%
- Less than 15 minutes late
- Cancelled
- 5.4%
- Of scheduled flights
- Average delay when late
- 64 min
- Flights arriving 15+ minutes late
- Flights tracked
- 37
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 44%
- Air traffic control & airport 27%
- Extreme weather 19%
- Airline (crew, maintenance, cleaning) 10%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Las Vegas (LAS)
Historically, this flight arrives 15+ minutes late 14% of the time, and when it is late the delay averages 98 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 86.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 98 min
- Flights arriving 15+ minutes late
- Flights tracked
- 37
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 46%
- Airline (crew, maintenance, cleaning) 30%
- Air traffic control & airport 24%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Houston (IAH)
Only 19 flights on record, which is too few for reliable odds.
- On-time arrivals
- 89.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 66 min
- Flights arriving 15+ minutes late
- Flights tracked
- 19
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 81%
- Airline (crew, maintenance, cleaning) 19%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 73.3% | 30 |
| October 2025 | 75.7% | 37 |
| November 2025 | 70.7% | 59 |
| December 2025 | 87.0% | 46 |
| January 2026 | 73.3% | 88 |
| February 2026 | 76.7% | 60 |
| March 2026 | 64.4% | 59 |
| April 2026 | 74.1% | 59 |
| May 2026 | 83.1% | 61 |
| June 2026 | 66.7% | 60 |
| July 2026 | 71.7% | 62 |
| August 2026 | 50.0% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 â August 2026. Covers flights operated by reporting U.S. carriers. About our data