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Flight Reliability

DL 5638 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5638 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

78%
Arrive within 15 minutes
3 min
Average arrival delay
3.0%
Cancelled
11 min early
Median arrival delay

Based on 534 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(78 flights)
  • Tue86%(78 flights)
  • Wed90%(78 flights)
  • Thu66%(77 flights)
  • Fri70%(79 flights)
  • Sat79%(48 flights)
  • Sun74%(80 flights)
On-time by departure window
  • 6–9 AM84%(79 flights)
  • 9 AM–12 PM83%(137 flights)
  • 12–3 PM87%(79 flights)
  • 3–6 PM72%(176 flights)
  • 6–9 PM64%(47 flights)
On-time trend by month
83%
May

Jun 60% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%52
July 202565%26
August 202585%47
September 202560%37
October 202574%27
November 202574%23
December 202581%42
January 202675%52
February 202692%48
March 202686%58
April 202689%54
May 202683%52
Departures on time
79%
Diverted
0%
Flights flown
518
Months covered
12

Keep nerding

Based on 534 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.