Flight UA1856
United Airlines flight UA1856
Looking for UA1856 in the airâŚ
Chicago (ORD) to Newark (EWR)
Historically, this flight arrives 15+ minutes late 23% of the time, and when it is late the delay averages 81 minutes. It was cancelled 3.6% of the time.
- On-time arrivals
- 77.3%
- Less than 15 minutes late
- Cancelled
- 3.6%
- Of scheduled flights
- Average delay when late
- 81 min
- Flights arriving 15+ minutes late
- Flights tracked
- 169
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 33%
- Late-arriving aircraft 30%
- Extreme weather 24%
- Airline (crew, maintenance, cleaning) 13%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Des Moines (DSM) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 11% of the time, and when it is late the delay averages 132 minutes. It was cancelled 1.2% of the time.
- On-time arrivals
- 88.9%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 132 min
- Flights arriving 15+ minutes late
- Flights tracked
- 82
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 66%
- Air traffic control & airport 34%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Knoxville/Maryville (TYS) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 17% of the time, and when it is late the delay averages 59 minutes. It was cancelled 1.3% of the time.
- On-time arrivals
- 82.9%
- Less than 15 minutes late
- Cancelled
- 1.3%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 77
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 66%
- Airline (crew, maintenance, cleaning) 25%
- Extreme weather 10%
- Late-arriving aircraft 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dallas-Fort Worth (DFW) to Newark (EWR)
Historically, this flight arrives 15+ minutes late 41% of the time, and when it is late the delay averages 106 minutes. It was cancelled 2.7% of the time.
- On-time arrivals
- 59.2%
- Less than 15 minutes late
- Cancelled
- 2.7%
- Of scheduled flights
- Average delay when late
- 106 min
- Flights arriving 15+ minutes late
- Flights tracked
- 74
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 58%
- Late-arriving aircraft 34%
- Airline (crew, maintenance, cleaning) 8%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Jackson (JAC) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 144 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 83.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 144 min
- Flights arriving 15+ minutes late
- Flights tracked
- 37
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 73%
- Airline (crew, maintenance, cleaning) 15%
- Air traffic control & airport 7%
- Extreme weather 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Seattle (SEA) to Newark (EWR)
Historically, this flight arrives 15+ minutes late 40% of the time, and when it is late the delay averages 70 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 60.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 25
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 81%
- Late-arriving aircraft 15%
- Airline (crew, maintenance, cleaning) 4%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Omaha (OMA) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 14% of the time, and when it is late the delay averages 76 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 85.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 76 min
- Flights arriving 15+ minutes late
- Flights tracked
- 21
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 73%
- Airline (crew, maintenance, cleaning) 27%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Newark (EWR) to Portland (PWM)
Only 18 flights on record, which is too few for reliable odds.
- On-time arrivals
- 52.9%
- Less than 15 minutes late
- Cancelled
- 5.6%
- Of scheduled flights
- Average delay when late
- 51 min
- Flights arriving 15+ minutes late
- Flights tracked
- 18
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 58%
- Airline (crew, maintenance, cleaning) 33%
- Air traffic control & airport 9%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Memphis (MEM) to Chicago (ORD)
Only 3 flights on record, which is too few for reliable odds.
- On-time arrivals
- 66.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 63 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 100%
- Airline (crew, maintenance, cleaning) 0%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Knoxville/Maryville (TYS)
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- â
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 71.4% | 30 |
| October 2025 | 50.0% | 30 |
| November 2025 | 57.7% | 27 |
| December 2025 | 57.1% | 29 |
| January 2026 | 80.6% | 31 |
| February 2026 | 79.5% | 45 |
| March 2026 | 84.2% | 59 |
| April 2026 | 80.6% | 31 |
| May 2026 | 83.9% | 62 |
| June 2026 | 86.4% | 60 |
| July 2026 | 86.2% | 62 |
| August 2026 | 65.9% | 41 |
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