Flight DL665
Delta Air Lines flight DL665
Looking for DL665 in the air…
Atlanta (ATL) to Ontario (ONT)
Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 58 minutes. It was cancelled 2.5% of the time.
- On-time arrivals
- 84.0%
- Less than 15 minutes late
- Cancelled
- 2.5%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 365
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 56%
- Air traffic control & airport 27%
- Late-arriving aircraft 14%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Ontario (ONT) to Atlanta (ATL)
Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 79 minutes. It was cancelled 1.6% of the time.
- On-time arrivals
- 83.9%
- Less than 15 minutes late
- Cancelled
- 1.6%
- 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) 48%
- Late-arriving aircraft 40%
- Air traffic control & airport 9%
- Security 3%
- Extreme weather 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 90.0% | 60 |
| October 2025 | 83.6% | 62 |
| November 2025 | 81.4% | 60 |
| December 2025 | 89.7% | 62 |
| January 2026 | 75.9% | 62 |
| February 2026 | 85.7% | 56 |
| March 2026 | 89.5% | 62 |
| April 2026 | 86.7% | 60 |
| May 2026 | 73.8% | 62 |
| June 2026 | 82.8% | 60 |
| July 2026 | 83.1% | 62 |
| August 2026 | 85.5% | 62 |
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