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Flight Reliability

DL 1809 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1809 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

72%
Arrive within 15 minutes
11 min
Average arrival delay
1.7%
Cancelled
1 min early
Median arrival delay

Based on 358 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(20 flights)
  • Tue81%(48 flights)
  • Wed83%(48 flights)
  • Thu72%(50 flights)
  • Fri75%(47 flights)
  • Sat68%(87 flights)
  • Sun51%(49 flights)
On-time by departure window
  • 9 AM–12 PM69%(123 flights)
  • 12–3 PM73%(45 flights)
  • 3–6 PM75%(152 flights)
  • 6–9 PM66%(29 flights)
On-time trend by month
80%
May

Aug 40% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202540%10
September 202585%40
October 202572%54
November 202570%20
December 202589%28
January 202661%51
February 202668%47
March 202665%49
April 202689%26
May 202680%10
Departures on time
74%
Diverted
0.8%
Flights flown
349
Months covered
12

Keep nerding

Based on 358 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.