Flight DL509
Delta Air Lines flight DL509
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Alerts at this flight's airports
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Watch Ground Delay Program SAN
Ground Delay Program at San Diego International Airport (SAN): Average 37 minutes, up to 1 hour and 11 minutes
Reason: airport volume
Airport status
-
Advisory Airport Closure SNA
Airport Closure at John Wayne Orange County International Airport (SNA): Reopens Nov 08 at 14:15 UTC.
Airport status
Detroit (DTW) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 48% of the time, and when it is late the delay averages 95 minutes. It was cancelled 0.7% of the time.
- On-time arrivals
- 51.8%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 95 min
- Flights arriving 15+ minutes late
- Flights tracked
- 138
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 40%
- Air traffic control & airport 33%
- Extreme weather 17%
- Late-arriving aircraft 10%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Santa Ana (SNA) to Salt Lake City (SLC)
Historically, this flight arrives 15+ minutes late 12% of the time, and when it is late the delay averages 293 minutes. It was cancelled 1.1% of the time.
- On-time arrivals
- 88.0%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 293 min
- Flights arriving 15+ minutes late
- Flights tracked
- 93
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 62%
- Air traffic control & airport 25%
- Late-arriving aircraft 13%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Nashville (BNA) to Los Angeles (LAX)
Historically, this flight arrives 15+ minutes late 20% of the time, and when it is late the delay averages 67 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 80.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 67 min
- Flights arriving 15+ minutes late
- Flights tracked
- 25
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 57%
- Late-arriving aircraft 39%
- Air traffic control & airport 4%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Diego (SAN) to New York (JFK)
Historically, this flight arrives 15+ minutes late 17% of the time, and when it is late the delay averages 184 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 83.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 184 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 89%
- Late-arriving aircraft 10%
- Air traffic control & airport 1%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Orlando (MCO) to Minneapolis (MSP)
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 0.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 64 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 100%
- Airline (crew, maintenance, cleaning) 0%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Headlines found by Google News; stories open on the publisher's site.
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 84.6% | 26 |
| October 2025 | 92.3% | 26 |
| November 2025 | 87.0% | 24 |
| December 2025 | 60.0% | 26 |
| January 2026 | 63.3% | 30 |
| February 2026 | 67.9% | 28 |
| March 2026 | 60.7% | 28 |
| April 2026 | 67.9% | 28 |
| May 2026 | 76.9% | 26 |
| June 2026 | 42.1% | 19 |
| July 2026 | 44.4% | 18 |
| August 2026 | 50.0% | 2 |
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