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Flight Reliability

DL 3646 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3646 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

74%
Arrive within 15 minutes
21 min
Average arrival delay
0%
Cancelled
4 min early
Median arrival delay

Based on 383 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(57 flights)
  • Tue77%(53 flights)
  • Wed77%(53 flights)
  • Thu75%(52 flights)
  • Fri67%(58 flights)
  • Sat71%(51 flights)
  • Sun70%(59 flights)
On-time by departure window
  • 12–3 PM79%(175 flights)
  • 3–6 PM70%(187 flights)
  • 9 PM–12 AM71%(21 flights)
On-time trend by month
71%
May

Jun 74% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%46
July 202581%62
August 202563%60
September 202562%60
October 202581%62
November 202588%56
December 202562%13
May 202671%21
Departures on time
74%
Diverted
0%
Flights flown
383
Months covered
9

Keep nerding

Based on 383 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.