Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 5644 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5644 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

70%
Arrive within 15 minutes
16 min
Average arrival delay
5.0%
Cancelled
8 min early
Median arrival delay

Based on 646 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon64%(90 flights)
  • Tue73%(97 flights)
  • Wed70%(94 flights)
  • Thu81%(90 flights)
  • Fri69%(94 flights)
  • Sat73%(56 flights)
  • Sun57%(90 flights)
On-time by departure window
  • 12–3 PM77%(48 flights)
  • 3–6 PM67%(381 flights)
  • 6–9 PM74%(182 flights)
On-time trend by month
77%
May

Jun 60% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%55
July 202558%52
August 202580%55
September 202546%52
October 202552%52
November 202581%42
December 202563%46
January 202685%47
February 202680%45
March 202677%51
April 202679%53
May 202677%61
Departures on time
71%
Diverted
0.5%
Flights flown
611
Months covered
12

Keep nerding

Based on 646 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.