Flight DL1178
Delta Air Lines flight DL1178
Looking for DL1178 in the air…
Chicago (ORD) to Atlanta (ATL)
Historically, this flight arrives 15+ minutes late 15% of the time, and when it is late the delay averages 54 minutes. It was cancelled 2.3% of the time.
- On-time arrivals
- 85.4%
- Less than 15 minutes late
- Cancelled
- 2.3%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 344
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 44%
- Air traffic control & airport 29%
- Airline (crew, maintenance, cleaning) 19%
- Extreme weather 8%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Atlanta (ATL) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 60 minutes. It was cancelled 2.5% of the time.
- On-time arrivals
- 87.4%
- Less than 15 minutes late
- Cancelled
- 2.5%
- Of scheduled flights
- Average delay when late
- 60 min
- Flights arriving 15+ minutes late
- Flights tracked
- 325
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 61%
- Airline (crew, maintenance, cleaning) 37%
- Late-arriving aircraft 2%
- Extreme weather 0%
- 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% | 60 |
| October 2025 | 91.7% | 60 |
| November 2025 | 86.8% | 54 |
| December 2025 | 68.3% | 62 |
| January 2026 | 85.4% | 50 |
| February 2026 | 88.6% | 44 |
| March 2026 | 90.7% | 60 |
| April 2026 | 79.3% | 60 |
| May 2026 | 85.7% | 58 |
| June 2026 | 96.2% | 53 |
| July 2026 | 92.6% | 55 |
| August 2026 | 79.2% | 53 |
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