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Flight UA312

United Airlines flight UA312

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Looking for UA312 in the air…

Chicago (ORD) to Austin (AUS)

Historically, this flight arrives 15+ minutes late 35% of the time, and when it is late the delay averages 73 minutes. It was cancelled 3.3% of the time.

On-time arrivals
65.2%
Less than 15 minutes late
Cancelled
3.3%
Of scheduled flights
Average delay when late
73 min
Flights arriving 15+ minutes late
Flights tracked
212
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 54%
  • Airline (crew, maintenance, cleaning) 20%
  • Extreme weather 14%
  • Air traffic control & airport 12%
  • 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 31% of the time, and when it is late the delay averages 114 minutes. It was cancelled 2.1% of the time.

On-time arrivals
68.8%
Less than 15 minutes late
Cancelled
2.1%
Of scheduled flights
Average delay when late
114 min
Flights arriving 15+ minutes late
Flights tracked
144
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 53%
  • Air traffic control & airport 39%
  • Airline (crew, maintenance, cleaning) 8%
  • Extreme weather 0%
  • Security 0%

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

Chicago (ORD) to Charleston (CHS)

Historically, this flight arrives 15+ minutes late 30% of the time, and when it is late the delay averages 67 minutes. It was cancelled 0.0% of the time.

On-time arrivals
69.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
67 min
Flights arriving 15+ minutes late
Flights tracked
86
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 54%
  • Airline (crew, maintenance, cleaning) 22%
  • Air traffic control & airport 16%
  • Extreme weather 7%
  • Security 0%

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

PBI → ORD

Historically, this flight arrives 15+ minutes late 38% of the time, and when it is late the delay averages 94 minutes. It was cancelled 0.0% of the time.

On-time arrivals
62.2%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
94 min
Flights arriving 15+ minutes late
Flights tracked
37
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 44%
  • Late-arriving aircraft 36%
  • Extreme weather 11%
  • Airline (crew, maintenance, cleaning) 8%
  • Security 0%

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

Columbus (CMH) to Dulles (IAD)

Historically, this flight arrives 15+ minutes late 4% of the time, and when it is late the delay averages 19 minutes. It was cancelled 0.0% of the time.

On-time arrivals
95.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
19 min
Flights arriving 15+ minutes late
Flights tracked
24
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 60%
  • Airline (crew, maintenance, cleaning) 40%
  • Air traffic control & airport 0%
  • Extreme weather 0%
  • Security 0%

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

Newark (EWR) to Rochester (ROC)

Only 16 flights on record, which is too few for reliable odds.

On-time arrivals
68.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
65 min
Flights arriving 15+ minutes late
Flights tracked
16
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 64%
  • Airline (crew, maintenance, cleaning) 20%
  • Air traffic control & airport 8%
  • Extreme weather 8%
  • Security 0%

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

Miami (MIA) to Newark (EWR)

Only 16 flights on record, which is too few for reliable odds.

On-time arrivals
37.5%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
124 min
Flights arriving 15+ minutes late
Flights tracked
16
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 62%
  • Air traffic control & airport 36%
  • Airline (crew, maintenance, cleaning) 1%
  • Extreme weather 0%
  • Security 0%

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

West Palm Beach (DJT) to Chicago (ORD)

Only 10 flights on record, which is too few for reliable odds.

On-time arrivals
40.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
96 min
Flights arriving 15+ minutes late
Flights tracked
10
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 47%
  • Air traffic control & airport 44%
  • Airline (crew, maintenance, cleaning) 9%
  • Extreme weather 0%
  • Security 0%

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

Charleston (CHS) to Chicago (ORD)

Only 4 flights on record, which is too few for reliable odds.

On-time arrivals
75.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
18 min
Flights arriving 15+ minutes late
Flights tracked
4
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).

Denver (DEN) to Wichita (ICT)

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

In the news

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On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 93.3% 30
October 2025 71.0% 31
November 2025 76.7% 30
December 2025 53.2% 47
January 2026 70.4% 57
February 2026 86.8% 39
March 2026 75.5% 51
April 2026 59.6% 55
May 2026 67.3% 51
June 2026 51.4% 36
July 2026 66.7% 61
August 2026 50.8% 62

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.