Flight DL531
Delta Air Lines flight DL531
Looking for DL531 in the air…
Alerts at this flight's airports
San Francisco (SFO) to Atlanta (ATL)
Historically, this flight arrives 15+ minutes late 26% of the time, and when it is late the delay averages 58 minutes. It was cancelled 0.4% of the time.
- On-time arrivals
- 73.9%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 235
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Airline (crew, maintenance, cleaning) 28%
- Air traffic control & airport 19%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Atlanta (ATL) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 30% of the time, and when it is late the delay averages 50 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 69.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 50 min
- Flights arriving 15+ minutes late
- Flights tracked
- 141
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 79%
- Airline (crew, maintenance, cleaning) 19%
- Extreme weather 1%
- Late-arriving aircraft 1%
- 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 | 73.3% | 30 |
| October 2025 | 87.1% | 31 |
| November 2025 | 78.6% | 29 |
| December 2025 | 80.6% | 31 |
| January 2026 | 64.5% | 31 |
| February 2026 | 71.0% | 31 |
| March 2026 | 91.4% | 35 |
| April 2026 | 56.2% | 32 |
| May 2026 | 77.4% | 31 |
| June 2026 | 66.7% | 33 |
| July 2026 | 64.5% | 31 |
| August 2026 | 54.8% | 31 |
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