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Flight Reliability

DL 4006 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4006 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

91%
Arrive within 15 minutes
1 min early
Average arrival delay
0.9%
Cancelled
11 min early
Median arrival delay

Based on 443 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(61 flights)
  • Tue92%(63 flights)
  • Wed90%(62 flights)
  • Thu94%(63 flights)
  • Fri89%(61 flights)
  • Sat97%(64 flights)
  • Sun92%(63 flights)
On-time by departure window
  • 6–9 AM93%(85 flights)
  • 12–3 PM97%(98 flights)
  • 3–6 PM96%(72 flights)
  • 6–9 PM86%(182 flights)
On-time trend by month
90%
May

Jun 90% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%60
July 202595%62
August 202589%61
September 202595%37
October 202597%31
November 2025100%10
December 202590%29
January 202679%28
February 202693%27
March 202690%31
April 202693%30
May 202690%31
Departures on time
91%
Diverted
0.5%
Flights flown
437
Months covered
12

Keep nerding

Based on 443 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.