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Flight Reliability

DL 2599 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 2599 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

84%
Arrive within 15 minutes
4 min early
Average arrival delay
2.7%
Cancelled
12 min early
Median arrival delay

Based on 590 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(88 flights)
  • Tue80%(89 flights)
  • Wed90%(90 flights)
  • Thu80%(88 flights)
  • Fri79%(80 flights)
  • Sat81%(57 flights)
  • Sun90%(81 flights)
On-time by departure window
  • 9 AM–12 PM82%(22 flights)
  • 12–3 PM78%(27 flights)
  • 3–6 PM85%(524 flights)
On-time trend by month
88%
May

Jun 61% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202561%33
July 202570%27
August 202583%52
September 202595%60
October 202593%54
November 202587%46
December 202577%30
January 202685%46
February 202686%55
March 202685%61
April 202681%59
May 202688%50
Departures on time
83%
Diverted
0.2%
Flights flown
573
Months covered
12

Keep nerding

Based on 590 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.