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Flight Reliability

DL 4917 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4917 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

66%
Arrive within 15 minutes
13 min
Average arrival delay
9.8%
Cancelled
6 min early
Median arrival delay

Based on 346 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(46 flights)
  • Tue62%(47 flights)
  • Wed71%(42 flights)
  • Thu63%(43 flights)
  • Fri64%(45 flights)
  • Sat85%(41 flights)
  • Sun51%(47 flights)
On-time by departure window
  • 9 AM–12 PM86%(22 flights)
  • 12–3 PM91%(22 flights)
  • 3–6 PM42%(24 flights)
  • 6–9 PM63%(218 flights)
  • 9 PM–12 AM76%(25 flights)
On-time trend by month
48%
May

Jun 65% → May 48% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202565%26
July 202574%27
August 202589%35
September 202582%33
October 202560%25
November 202555%22
December 202539%23
January 202676%21
February 202682%22
March 202644%23
April 202668%25
May 202648%29
Departures on time
68%
Diverted
0.3%
Flights flown
311
Months covered
12

Keep nerding

Based on 346 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.