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Flight Reliability

DL 1966 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1966 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

84%
Arrive within 15 minutes
5 min early
Average arrival delay
2.6%
Cancelled
13 min early
Median arrival delay

Based on 577 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(76 flights)
  • Tue84%(79 flights)
  • Wed85%(81 flights)
  • Thu88%(80 flights)
  • Fri89%(78 flights)
  • Sat80%(88 flights)
  • Sun77%(78 flights)
On-time by departure window
  • 6–9 AM84%(299 flights)
  • 12–3 PM85%(256 flights)
  • 3–6 PM—(5 flights)
On-time trend by month
82%
May

Jun 90% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%60
July 202582%61
August 202585%61
September 202588%40
October 202565%17
November 202577%22
December 202593%14
January 202682%54
February 202675%51
March 202690%60
April 202690%60
May 202682%60
Departures on time
86%
Diverted
0.3%
Flights flown
560
Months covered
12

Keep nerding

Based on 577 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.