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Flight Reliability

DL 3965 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3965 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

71%
Arrive within 15 minutes
22 min
Average arrival delay
0.2%
Cancelled
6 min early
Median arrival delay

Based on 470 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon64%(73 flights)
  • Tue82%(73 flights)
  • Wed77%(73 flights)
  • Thu64%(70 flights)
  • Fri65%(68 flights)
  • Sat77%(39 flights)
  • Sun67%(72 flights)
On-time by departure window
  • 6–9 AM92%(25 flights)
  • 9 AM–12 PM83%(24 flights)
  • 12–3 PM74%(85 flights)
  • 3–6 PM70%(245 flights)
  • 6–9 PM51%(53 flights)
  • 9 PM–12 AM69%(36 flights)
On-time trend by month
84%
May

Jun 54% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%57
July 202554%52
August 202554%50
September 202573%52
November 202585%40
December 202553%38
January 202696%27
February 202686%28
March 202665%31
April 202690%48
May 202684%37
Departures on time
74%
Diverted
0.2%
Flights flown
468
Months covered
12

Keep nerding

Based on 470 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.