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Flight Reliability

DL 4817 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4817 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

79%
Arrive within 15 minutes
9 min
Average arrival delay
2.1%
Cancelled
6 min early
Median arrival delay

Based on 243 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(31 flights)
  • Tue69%(35 flights)
  • Wed83%(35 flights)
  • Thu74%(35 flights)
  • Fri82%(34 flights)
  • Sat88%(33 flights)
  • Sun71%(34 flights)
On-time by departure window
  • 6–9 AM92%(126 flights)
  • 12–3 PM61%(61 flights)
  • 3–6 PM73%(40 flights)
  • 6–9 PM60%(10 flights)
On-time trend by month
75%
Apr

Jun 57% → Apr 75% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%21
July 202557%30
August 202584%31
September 202590%30
October 202594%31
November 202596%27
December 202582%28
March 202671%24
April 202675%12
Departures on time
80%
Diverted
0.4%
Flights flown
237
Months covered
10

Keep nerding

Based on 243 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.