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Flight Reliability

DL 579 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 579 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

83%
Arrive within 15 minutes
11 min
Average arrival delay
0.6%
Cancelled
8 min early
Median arrival delay

Based on 172 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(19 flights)
  • Tue88%(17 flights)
  • Wed94%(17 flights)
  • Thu88%(17 flights)
  • Fri88%(17 flights)
  • Sat76%(42 flights)
  • Sun74%(42 flights)
On-time by departure window
  • 6–9 AM95%(20 flights)
  • 9 AM–12 PM70%(27 flights)
  • 12–3 PM—(7 flights)
  • 3–6 PM84%(117 flights)
On-time trend by month
84%
Dec

Jun 29% → Dec 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202529%14
July 202581%16
August 202586%22
September 202581%26
October 202593%30
November 202593%29
December 202584%31
Departures on time
78%
Diverted
0%
Flights flown
171
Months covered
8

Keep nerding

Based on 172 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.