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Flight Reliability

DL 4992 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4992 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

81%
Arrive within 15 minutes
5 min
Average arrival delay
2.2%
Cancelled
9 min early
Median arrival delay

Based on 401 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(62 flights)
  • Tue80%(56 flights)
  • Wed84%(56 flights)
  • Thu77%(61 flights)
  • Fri76%(62 flights)
  • Sat90%(40 flights)
  • Sun73%(55 flights)
On-time by departure window
  • 6–9 AM81%(16 flights)
  • 9 AM–12 PM87%(203 flights)
  • 12–3 PM82%(11 flights)
  • 3–6 PM73%(135 flights)
  • 6–9 PM74%(27 flights)
On-time trend by month
77%
May

Jun 63% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202566%29
August 202593%27
September 202593%27
October 202590%30
November 202587%23
December 202587%15
January 202670%47
February 202683%36
March 202684%56
April 202686%42
May 202677%30
Departures on time
81%
Diverted
0%
Flights flown
392
Months covered
12

Keep nerding

Based on 401 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.