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Flight Reliability

DL 879 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 879 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
3 min early
Average arrival delay
1.2%
Cancelled
13 min early
Median arrival delay

Based on 324 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(51 flights)
  • Tue91%(42 flights)
  • Wed91%(42 flights)
  • Thu78%(50 flights)
  • Fri79%(48 flights)
  • Sat95%(37 flights)
  • Sun72%(50 flights)
On-time by departure window
  • 6–9 AM84%(25 flights)
  • 9 AM–12 PM91%(93 flights)
  • 12–3 PM73%(125 flights)
  • 3–6 PM90%(77 flights)
On-time trend by month
87%
May

Jun 70% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%20
July 202556%16
August 202561%23
September 202576%29
October 202587%31
November 202590%29
December 202591%42
January 202688%34
February 2026100%11
March 202692%24
April 202687%30
May 202687%31
Departures on time
83%
Diverted
0%
Flights flown
320
Months covered
12

Keep nerding

Based on 324 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.