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Flight Reliability

DL 5142 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5142 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

79%
Arrive within 15 minutes
8 min
Average arrival delay
1.8%
Cancelled
11 min early
Median arrival delay

Based on 623 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(92 flights)
  • Tue82%(92 flights)
  • Wed83%(89 flights)
  • Thu74%(87 flights)
  • Fri78%(91 flights)
  • Sat84%(73 flights)
  • Sun81%(88 flights)
On-time by departure window
  • 6–9 AM87%(121 flights)
  • 9 AM–12 PM84%(176 flights)
  • 12–3 PM66%(103 flights)
  • 3–6 PM73%(186 flights)
  • 6–9 PM92%(26 flights)
On-time trend by month
86%
May

Jun 73% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%60
July 202556%57
August 202569%55
September 202588%48
October 202588%33
November 202587%30
December 202564%36
January 202686%55
February 202693%54
March 202682%62
April 202677%60
May 202686%62
Departures on time
78%
Diverted
0%
Flights flown
612
Months covered
12

Keep nerding

Based on 623 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.