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Flight UA1856

United Airlines flight UA1856

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Looking for UA1856 in the air…

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
—
Flights arriving 15+ minutes late
Flights tracked
1
Scheduled flights in the period

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On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
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 – August 2026. Covers flights operated by reporting U.S. carriers. About our data

Latest airport & airline headlines

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Headlines found by Google News; stories open on the publisher's site.