Flight UA1575
United Airlines flight UA1575
Looking for UA1575 in the airâŚ
Alerts at this flight's airports
Denver (DEN) to Philadelphia (PHL)
Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 60 minutes. It was cancelled 0.3% of the time.
- On-time arrivals
- 87.0%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 60 min
- Flights arriving 15+ minutes late
- Flights tracked
- 301
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 38%
- Late-arriving aircraft 37%
- Airline (crew, maintenance, cleaning) 26%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Philadelphia (PHL) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 44% of the time, and when it is late the delay averages 113 minutes. It was cancelled 0.4% of the time.
- On-time arrivals
- 56.0%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 113 min
- Flights arriving 15+ minutes late
- Flights tracked
- 258
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 52%
- Late-arriving aircraft 26%
- Extreme weather 15%
- Airline (crew, maintenance, cleaning) 7%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Houston (IAH) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 20% of the time, and when it is late the delay averages 48 minutes. It was cancelled 1.0% of the time.
- On-time arrivals
- 80.4%
- Less than 15 minutes late
- Cancelled
- 1.0%
- Of scheduled flights
- Average delay when late
- 48 min
- Flights arriving 15+ minutes late
- Flights tracked
- 103
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 69%
- Air traffic control & airport 27%
- Extreme weather 3%
- Late-arriving aircraft 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Louisville (SDF) to Denver (DEN)
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
- â
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 82.8% | 29 |
| October 2025 | 77.6% | 58 |
| November 2025 | 84.7% | 59 |
| December 2025 | 75.0% | 32 |
| January 2026 | 83.3% | 31 |
| February 2026 | 79.2% | 24 |
| March 2026 | 76.4% | 55 |
| April 2026 | 67.9% | 56 |
| May 2026 | 68.6% | 70 |
| June 2026 | 67.1% | 82 |
| July 2026 | 67.5% | 82 |
| August 2026 | 75.3% | 85 |
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