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Flight Reliability

DL 3956 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3956 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

86%
Arrive within 15 minutes
3 min
Average arrival delay
0.4%
Cancelled
9 min early
Median arrival delay

Based on 257 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(37 flights)
  • Tue92%(37 flights)
  • Wed82%(39 flights)
  • Thu88%(40 flights)
  • Fri87%(37 flights)
  • Sat89%(26 flights)
  • Sun85%(40 flights)
On-time by departure window
  • 6–9 AM88%(86 flights)
  • 9 AM–12 PM74%(27 flights)
  • 3–6 PM—(5 flights)
  • 6–9 PM88%(137 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
87%
May

Jun 82% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%44
July 202570%10
September 2025100%20
October 202584%31
January 202696%24
February 202676%25
March 202686%29
April 202687%30
May 202687%31
Departures on time
88%
Diverted
0%
Flights flown
256
Months covered
12

Keep nerding

Based on 257 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.