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Flight Reliability

DL 3993 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3993 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

83%
Arrive within 15 minutes
10 min
Average arrival delay
0.8%
Cancelled
9 min early
Median arrival delay

Based on 520 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(73 flights)
  • Tue85%(75 flights)
  • Wed87%(75 flights)
  • Thu81%(78 flights)
  • Fri80%(73 flights)
  • Sat87%(67 flights)
  • Sun85%(75 flights)
On-time by departure window
  • 6–9 AM82%(278 flights)
  • 9 AM–12 PM85%(238 flights)
On-time trend by month
86%
May

Jun 87% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%53
July 202577%62
August 202589%62
September 202595%60
October 202593%60
November 202579%56
December 202557%37
January 202679%24
February 202675%40
March 202675%12
May 202686%50
Departures on time
85%
Diverted
0%
Flights flown
516
Months covered
11

Keep nerding

Based on 520 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.