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Flight Reliability

DL 4915 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4915 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

76%
Arrive within 15 minutes
11 min
Average arrival delay
6.3%
Cancelled
13 min early
Median arrival delay

Based on 521 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(76 flights)
  • Tue77%(74 flights)
  • Wed74%(78 flights)
  • Thu68%(72 flights)
  • Fri81%(74 flights)
  • Sat82%(44 flights)
  • Sun74%(70 flights)
On-time by departure window
  • 6–9 AM89%(44 flights)
  • 9 AM–12 PM88%(43 flights)
  • 12–3 PM78%(175 flights)
  • 3–6 PM66%(179 flights)
  • 6–9 PM79%(47 flights)
On-time trend by month
89%
May

Jun 73% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%45
July 202566%55
August 202588%56
September 202589%55
October 202575%57
November 202567%52
December 202570%43
January 202691%23
February 202673%22
March 202650%26
April 202675%28
May 202689%26
Departures on time
77%
Diverted
0%
Flights flown
488
Months covered
12

Keep nerding

Based on 521 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.