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Flight Reliability

DL 827 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 827 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
4 min
Average arrival delay
1.1%
Cancelled
5 min early
Median arrival delay

Based on 355 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(50 flights)
  • Tue90%(51 flights)
  • Wed80%(51 flights)
  • Thu89%(52 flights)
  • Fri84%(51 flights)
  • Sat81%(47 flights)
  • Sun84%(49 flights)
On-time by departure window
  • 6–9 AM89%(45 flights)
  • 9 AM–12 PM84%(255 flights)
  • 12–3 PM96%(24 flights)
  • 3–6 PM60%(10 flights)
  • 6–9 PM71%(17 flights)
On-time trend by month
97%
May

Jun 83% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%35
July 202584%31
August 202587%30
September 202570%30
October 202581%31
November 202583%29
December 202576%29
January 202681%31
February 202689%45
March 2026100%14
April 202688%16
May 202697%30
Departures on time
84%
Diverted
0%
Flights flown
351
Months covered
12

Keep nerding

Based on 355 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.