Flight UA1542
United Airlines flight UA1542
Looking for UA1542 in the airâŚ
Houston (IAH) to San Antonio (SAT)
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 61 minutes. It was cancelled 0.3% of the time.
- On-time arrivals
- 78.2%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 61 min
- Flights arriving 15+ minutes late
- Flights tracked
- 340
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Airline (crew, maintenance, cleaning) 39%
- Air traffic control & airport 9%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Portland (PDX) to Houston (IAH)
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 102 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 77.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 102 min
- Flights arriving 15+ minutes late
- Flights tracked
- 36
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 57%
- Late-arriving aircraft 42%
- Airline (crew, maintenance, cleaning) 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Albuquerque (ABQ) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 234 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 87.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 234 min
- Flights arriving 15+ minutes late
- Flights tracked
- 23
- Scheduled flights in the period
What caused the delays
- Extreme weather 58%
- Air traffic control & airport 20%
- Airline (crew, maintenance, cleaning) 14%
- Late-arriving aircraft 8%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Las Vegas (LAS) to Los Angeles (LAX)
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
Los Angeles (LAX) to Houston (IAH)
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 | 93.8% | 32 |
| October 2025 | 83.8% | 37 |
| November 2025 | 79.3% | 58 |
| December 2025 | 68.8% | 32 |
| January 2026 | 86.7% | 31 |
| February 2026 | 82.1% | 28 |
| March 2026 | 90.0% | 30 |
| April 2026 | 76.7% | 30 |
| May 2026 | 71.0% | 31 |
| June 2026 | 60.0% | 30 |
| July 2026 | 64.5% | 31 |
| August 2026 | 87.1% | 31 |
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