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Flight Reliability

DL 959 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 959 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

71%
Arrive within 15 minutes
13 min
Average arrival delay
1.1%
Cancelled
0 min
Median arrival delay

Based on 620 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(97 flights)
  • Tue75%(77 flights)
  • Wed82%(74 flights)
  • Thu74%(97 flights)
  • Fri70%(98 flights)
  • Sat84%(73 flights)
  • Sun48%(95 flights)
On-time by departure window
  • 3–6 PM71%(357 flights)
  • 6–9 PM71%(254 flights)
On-time trend by month
82%
May

Jun 48% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%58
July 202558%60
August 202568%50
September 202586%42
October 202577%47
November 202577%39
December 202569%48
January 202667%46
February 202674%42
March 202670%59
April 202682%60
May 202682%60
Departures on time
70%
Diverted
0.3%
Flights flown
611
Months covered
12

Keep nerding

Based on 620 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.