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Flight UA1803

United Airlines flight UA1803

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Looking for UA1803 in the air…

Chicago (ORD) to Denver (DEN)

Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 61 minutes. It was cancelled 0.3% of the time.

On-time arrivals
84.5%
Less than 15 minutes late
Cancelled
0.3%
Of scheduled flights
Average delay when late
61 min
Flights arriving 15+ minutes late
Flights tracked
297
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 38%
  • Airline (crew, maintenance, cleaning) 31%
  • Late-arriving aircraft 22%
  • Extreme weather 9%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Pittsburgh (PIT) to Chicago (ORD)

Historically, this flight arrives 15+ minutes late 12% of the time, and when it is late the delay averages 110 minutes. It was cancelled 1.4% of the time.

On-time arrivals
88.1%
Less than 15 minutes late
Cancelled
1.4%
Of scheduled flights
Average delay when late
110 min
Flights arriving 15+ minutes late
Flights tracked
214
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 49%
  • Airline (crew, maintenance, cleaning) 29%
  • Late-arriving aircraft 21%
  • Extreme weather 1%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Raleigh/Durham (RDU) to Chicago (ORD)

Historically, this flight arrives 15+ minutes late 8% of the time, and when it is late the delay averages 60 minutes. It was cancelled 0.0% of the time.

On-time arrivals
92.1%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
60 min
Flights arriving 15+ minutes late
Flights tracked
101
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 68%
  • Airline (crew, maintenance, cleaning) 32%
  • Late-arriving aircraft 0%
  • Extreme weather 0%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Denver (DEN) to Hayden (HDN)

Historically, this flight arrives 15+ minutes late 29% of the time, and when it is late the delay averages 55 minutes. It was cancelled 1.7% of the time.

On-time arrivals
71.4%
Less than 15 minutes late
Cancelled
1.7%
Of scheduled flights
Average delay when late
55 min
Flights arriving 15+ minutes late
Flights tracked
58
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 49%
  • Late-arriving aircraft 41%
  • Airline (crew, maintenance, cleaning) 10%
  • Extreme weather 0%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Chicago (ORD) to Des Moines (DSM)

Historically, this flight arrives 15+ minutes late 9% of the time, and when it is late the delay averages 157 minutes. It was cancelled 0.0% of the time.

On-time arrivals
91.5%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
157 min
Flights arriving 15+ minutes late
Flights tracked
47
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 79%
  • Airline (crew, maintenance, cleaning) 11%
  • Extreme weather 7%
  • Air traffic control & airport 2%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Denver (DEN) to Colorado Springs (COS)

Historically, this flight arrives 15+ minutes late 26% of the time, and when it is late the delay averages 100 minutes. It was cancelled 2.9% of the time.

On-time arrivals
73.5%
Less than 15 minutes late
Cancelled
2.9%
Of scheduled flights
Average delay when late
100 min
Flights arriving 15+ minutes late
Flights tracked
35
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 46%
  • Airline (crew, maintenance, cleaning) 35%
  • Extreme weather 12%
  • Air traffic control & airport 7%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Denver (DEN) to Las Vegas (LAS)

Historically, this flight arrives 15+ minutes late 21% of the time, and when it is late the delay averages 33 minutes. It was cancelled 0.0% of the time.

On-time arrivals
79.2%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
33 min
Flights arriving 15+ minutes late
Flights tracked
24
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 81%
  • Airline (crew, maintenance, cleaning) 13%
  • Late-arriving aircraft 6%
  • Extreme weather 0%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

Chicago (ORD) to Las Vegas (LAS)

Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 45 minutes. It was cancelled 0.0% of the time.

On-time arrivals
81.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
45 min
Flights arriving 15+ minutes late
Flights tracked
21
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 75%
  • Extreme weather 25%
  • Airline (crew, maintenance, cleaning) 0%
  • Late-arriving aircraft 0%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

In the news

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On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 90.1% 81
October 2025 93.4% 61
November 2025 83.1% 59
December 2025 81.7% 60
January 2026 80.0% 88
February 2026 80.5% 83
March 2026 81.5% 66
April 2026 87.9% 60
May 2026 88.9% 72
June 2026 85.5% 84
July 2026 90.3% 31
August 2026 82.7% 52

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.