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Flight Reliability

DL 3865 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3865 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

83%
Arrive within 15 minutes
8 min
Average arrival delay
0.8%
Cancelled
7 min early
Median arrival delay

Based on 516 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(75 flights)
  • Tue76%(76 flights)
  • Wed87%(75 flights)
  • Thu79%(75 flights)
  • Fri83%(72 flights)
  • Sat88%(64 flights)
  • Sun88%(74 flights)
On-time by departure window
  • 9 AM–12 PM95%(93 flights)
  • 12–3 PM77%(186 flights)
  • 3–6 PM82%(212 flights)
  • 6–9 PM85%(20 flights)
On-time trend by month
100%
May

Jun 82% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%51
July 202575%57
August 202588%56
September 202593%60
October 202578%60
November 202584%57
December 202550%48
January 202690%30
February 202696%23
March 202689%27
April 202693%28
May 2026100%14
Departures on time
81%
Diverted
0.2%
Flights flown
511
Months covered
12

Keep nerding

Based on 516 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.