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Flight Reliability

DL 1644 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1644 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

73%
Arrive within 15 minutes
11 min
Average arrival delay
0.8%
Cancelled
6 min early
Median arrival delay

Based on 239 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon65%(37 flights)
  • Tue81%(32 flights)
  • Wed78%(32 flights)
  • Thu77%(43 flights)
  • Fri69%(45 flights)
  • Sat—(9 flights)
  • Sun62%(39 flights)
On-time by departure window
  • 6–9 AM94%(18 flights)
  • 9 AM–12 PM90%(19 flights)
  • 12–3 PM82%(55 flights)
  • 3–6 PM82%(22 flights)
  • 6–9 PM77%(61 flights)
  • 9 PM–12 AM45%(62 flights)
On-time trend by month
68%
May

Jun 41% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202541%22
July 202541%22
August 202540%15
September 202592%12
October 202579%14
December 202588%17
January 202681%16
February 202688%34
March 202683%36
April 202686%28
May 202668%19
Departures on time
72%
Diverted
0%
Flights flown
237
Months covered
12

Keep nerding

Based on 239 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.