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Flight Reliability

DL 4971 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4971 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
2 min early
Average arrival delay
1.5%
Cancelled
12 min early
Median arrival delay

Based on 544 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(80 flights)
  • Tue85%(79 flights)
  • Wed89%(81 flights)
  • Thu86%(79 flights)
  • Fri78%(77 flights)
  • Sat91%(63 flights)
  • Sun80%(76 flights)
On-time by departure window
  • 9 AM–12 PM93%(197 flights)
  • 12–3 PM82%(313 flights)
  • 6–9 PM64%(25 flights)
On-time trend by month
68%
May

Jun 87% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%60
July 202587%62
August 2025100%54
September 202597%58
October 202595%62
November 202572%50
December 202581%41
January 202683%29
February 202682%28
March 202673%30
April 202673%30
May 202668%31
Departures on time
84%
Diverted
0.2%
Flights flown
535
Months covered
12

Keep nerding

Based on 544 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.