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Flight Reliability

DL 3989 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3989 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

89%
Arrive within 15 minutes
0 min
Average arrival delay
1.2%
Cancelled
11 min early
Median arrival delay

Based on 505 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(72 flights)
  • Tue92%(72 flights)
  • Wed88%(72 flights)
  • Thu92%(72 flights)
  • Fri83%(72 flights)
  • Sat86%(70 flights)
  • Sun93%(69 flights)
On-time by departure window
  • 6–9 AM94%(211 flights)
  • 9 AM–12 PM85%(144 flights)
  • 12–3 PM84%(144 flights)
On-time trend by month
87%
May

Jun 96% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202596%23
July 2025100%31
August 202594%31
September 2025100%30
October 202587%31
November 2025100%30
December 202587%31
January 202676%54
February 202693%56
March 202678%60
April 202688%60
May 202687%62
Departures on time
88%
Diverted
0%
Flights flown
499
Months covered
12

Keep nerding

Based on 505 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.