Flight UA456
United Airlines flight UA456
Looking for UA456 in the airâŚ
Alerts at this flight's airports
Denver (DEN) to Austin (AUS)
Historically, this flight arrives 15+ minutes late 7% of the time, and when it is late the delay averages 60 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 93.1%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 60 min
- Flights arriving 15+ minutes late
- Flights tracked
- 307
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 60%
- Late-arriving aircraft 26%
- Airline (crew, maintenance, cleaning) 14%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Austin (AUS) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 31% of the time, and when it is late the delay averages 98 minutes. It was cancelled 0.6% of the time.
- On-time arrivals
- 68.8%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 98 min
- Flights arriving 15+ minutes late
- Flights tracked
- 175
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 65%
- Late-arriving aircraft 24%
- Airline (crew, maintenance, cleaning) 11%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Washington (DCA)
Historically, this flight arrives 15+ minutes late 47% of the time, and when it is late the delay averages 126 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 52.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 126 min
- Flights arriving 15+ minutes late
- Flights tracked
- 56
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 49%
- Late-arriving aircraft 42%
- Airline (crew, maintenance, cleaning) 9%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Cedar Rapids (CID)
Historically, this flight arrives 15+ minutes late 40% of the time, and when it is late the delay averages 131 minutes. It was cancelled 4.8% of the time.
- On-time arrivals
- 60.0%
- Less than 15 minutes late
- Cancelled
- 4.8%
- Of scheduled flights
- Average delay when late
- 131 min
- Flights arriving 15+ minutes late
- Flights tracked
- 21
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 71%
- Airline (crew, maintenance, cleaning) 24%
- Air traffic control & airport 4%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Omaha (OMA) to Houston (IAH)
Only 5 flights on record, which is too few for reliable odds.
- On-time arrivals
- 60.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 77 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 45%
- Airline (crew, maintenance, cleaning) 39%
- Air traffic control & airport 16%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Dallas-Fort Worth (DFW)
Only 5 flights on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 20.0%
- Of scheduled flights
- Average delay when late
- â
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
Dulles (IAD) to Bozeman (BZN)
Only 3 flights on record, which is too few for reliable odds.
- On-time arrivals
- 33.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 71 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3
- 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).
Los Angeles (LAX) to Cleveland (CLE)
Only 3 flights 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
- 3
- Scheduled flights in the period
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Headlines found by Google News; stories open on the publisher's site.
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 100.0% | 27 |
| October 2025 | 82.8% | 29 |
| November 2025 | 89.5% | 19 |
| December 2025 | 78.3% | 23 |
| January 2026 | 93.1% | 30 |
| February 2026 | 96.4% | 28 |
| March 2026 | 81.1% | 53 |
| April 2026 | 78.7% | 49 |
| May 2026 | 82.6% | 70 |
| June 2026 | 77.6% | 87 |
| July 2026 | 73.3% | 91 |
| August 2026 | 67.2% | 69 |
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