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Flight Reliability

DL 5597 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5597 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

85%
Arrive within 15 minutes
1 min early
Average arrival delay
0.8%
Cancelled
12 min early
Median arrival delay

Based on 593 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(87 flights)
  • Tue91%(89 flights)
  • Wed91%(89 flights)
  • Thu72%(87 flights)
  • Fri81%(79 flights)
  • Sat85%(74 flights)
  • Sun92%(83 flights)
On-time by departure window
  • 6–9 AM87%(244 flights)
  • 9 AM–12 PM87%(187 flights)
  • 12–3 PM76%(100 flights)
  • 6–9 PM—(9 flights)
  • 9 PM–12 AM88%(48 flights)
On-time trend by month
91%
May

Jun 89% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%53
July 202587%61
August 202589%62
September 202588%40
October 202584%51
November 202596%54
December 202577%48
January 202686%28
February 202681%26
March 202669%55
April 202679%52
May 202691%58
Departures on time
85%
Diverted
0%
Flights flown
588
Months covered
12

Keep nerding

Based on 593 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.