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Flight Reliability

DL 5040 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5040 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

65%
Arrive within 15 minutes
21 min
Average arrival delay
6.7%
Cancelled
6 min early
Median arrival delay

Based on 252 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon57%(35 flights)
  • Tue70%(37 flights)
  • Wed71%(35 flights)
  • Thu61%(36 flights)
  • Fri65%(37 flights)
  • Sat75%(20 flights)
  • Sun62%(34 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM68%(106 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM62%(118 flights)
On-time trend by month
73%
May

Jun 56% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202556%25
July 202561%31
August 202576%33
December 202567%12
January 202664%25
February 202677%22
March 202646%24
April 202656%25
May 202673%26
Departures on time
69%
Diverted
0.4%
Flights flown
234
Months covered
12

Keep nerding

Based on 252 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.