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Flight Reliability

DL 1205 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1205 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

65%
Arrive within 15 minutes
24 min
Average arrival delay
0.3%
Cancelled
2 min
Median arrival delay

Based on 312 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon53%(47 flights)
  • Tue81%(37 flights)
  • Wed64%(36 flights)
  • Thu79%(47 flights)
  • Fri74%(46 flights)
  • Sat67%(48 flights)
  • Sun43%(49 flights)
On-time by departure window
  • 12–3 PM63%(27 flights)
  • 3–6 PM63%(112 flights)
  • 6–9 PM67%(171 flights)
On-time trend by month
68%
May

Jun 57% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%35
July 202559%29
August 202567%21
September 202575%12
October 202568%19
November 202571%24
December 202554%43
January 202666%35
February 202667%12
April 202680%20
May 202668%56
Departures on time
64%
Diverted
0.3%
Flights flown
310
Months covered
12

Keep nerding

Based on 312 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.