Flight UA1235
United Airlines flight UA1235
Looking for UA1235 in the airâŚ
Dayton (DAY) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 5% of the time, and when it is late the delay averages 286 minutes. It was cancelled 0.7% of the time.
- On-time arrivals
- 94.8%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 286 min
- Flights arriving 15+ minutes late
- Flights tracked
- 135
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 94%
- Late-arriving aircraft 5%
- Air traffic control & airport 1%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Madison (MSN)
Historically, this flight arrives 15+ minutes late 9% of the time, and when it is late the delay averages 75 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 90.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 75 min
- Flights arriving 15+ minutes late
- Flights tracked
- 88
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 48%
- Late-arriving aircraft 45%
- Air traffic control & airport 8%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Detroit (DTW) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 25% of the time, and when it is late the delay averages 50 minutes. It was cancelled 1.2% of the time.
- On-time arrivals
- 75.0%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 50 min
- Flights arriving 15+ minutes late
- Flights tracked
- 82
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 57%
- Airline (crew, maintenance, cleaning) 42%
- Extreme weather 1%
- Late-arriving aircraft 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Los Angeles (LAX) to Houston (IAH)
Historically, this flight arrives 15+ minutes late 8% of the time, and when it is late the delay averages 99 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 91.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 99 min
- Flights arriving 15+ minutes late
- Flights tracked
- 37
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 67%
- Air traffic control & airport 33%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Norfolk (ORF)
Only 15 flights on record, which is too few for reliable odds.
- On-time arrivals
- 80.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 15
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 56%
- Airline (crew, maintenance, cleaning) 44%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Des Moines (DSM)
Only 2 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
- 2
- Scheduled flights in the period
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 93.3% | 30 |
| October 2025 | 87.1% | 31 |
| November 2025 | 93.3% | 30 |
| December 2025 | 90.3% | 31 |
| January 2026 | 64.5% | 31 |
| February 2026 | 85.2% | 28 |
| March 2026 | 83.3% | 31 |
| April 2026 | 100.0% | 30 |
| May 2026 | 96.7% | 31 |
| June 2026 | 86.7% | 30 |
| July 2026 | 93.5% | 31 |
| August 2026 | 88.0% | 25 |
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