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Flight Reliability

DL 1209 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1209 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

88%
Arrive within 15 minutes
1 min early
Average arrival delay
1.1%
Cancelled
8 min early
Median arrival delay

Based on 726 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(104 flights)
  • Tue97%(104 flights)
  • Wed95%(101 flights)
  • Thu87%(102 flights)
  • Fri87%(103 flights)
  • Sat88%(104 flights)
  • Sun81%(100 flights)
On-time by departure window
  • 9 AM–12 PM88%(359 flights)
  • 12–3 PM88%(359 flights)
On-time trend by month
98%
May

Jun 85% → May 98% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%60
July 202584%62
August 202583%60
September 202587%60
October 202592%62
November 202589%56
December 202581%62
January 202685%60
February 202689%54
March 202687%62
April 202698%60
May 202698%60
Departures on time
86%
Diverted
0%
Flights flown
718
Months covered
12

Keep nerding

Based on 726 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.