Flight DL1143
Delta Air Lines flight DL1143
Looking for DL1143 in the air…
Los Angeles (LAX) to Houston (IAH)
Historically, this flight arrives 15+ minutes late 14% of the time, and when it is late the delay averages 79 minutes. It was cancelled 0.5% of the time.
- On-time arrivals
- 85.6%
- Less than 15 minutes late
- Cancelled
- 0.5%
- Of scheduled flights
- Average delay when late
- 79 min
- Flights arriving 15+ minutes late
- Flights tracked
- 365
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 52%
- Air traffic control & airport 25%
- Late-arriving aircraft 23%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Houston (IAH) to Los Angeles (LAX)
Historically, this flight arrives 15+ minutes late 23% of the time, and when it is late the delay averages 94 minutes. It was cancelled 1.0% of the time.
- On-time arrivals
- 76.7%
- Less than 15 minutes late
- Cancelled
- 1.0%
- Of scheduled flights
- Average delay when late
- 94 min
- Flights arriving 15+ minutes late
- Flights tracked
- 104
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 73%
- Airline (crew, maintenance, cleaning) 20%
- Air traffic control & airport 5%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 93.3% | 30 |
| October 2025 | 90.3% | 31 |
| November 2025 | 83.3% | 30 |
| December 2025 | 87.2% | 40 |
| January 2026 | 90.9% | 34 |
| February 2026 | 82.1% | 28 |
| March 2026 | 86.2% | 31 |
| April 2026 | 83.3% | 30 |
| May 2026 | 82.4% | 51 |
| June 2026 | 76.9% | 53 |
| July 2026 | 72.7% | 55 |
| August 2026 | 85.7% | 56 |
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