Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 809 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 809 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

91%
Arrive within 15 minutes
6 min early
Average arrival delay
1.0%
Cancelled
13 min early
Median arrival delay

Based on 729 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon92%(102 flights)
  • Tue93%(102 flights)
  • Wed95%(103 flights)
  • Thu93%(103 flights)
  • Fri90%(103 flights)
  • Sat83%(100 flights)
  • Sun91%(106 flights)
On-time by departure window
  • 6–9 AM93%(41 flights)
  • 9 AM–12 PM89%(319 flights)
  • 12–3 PM93%(359 flights)
On-time trend by month
89%
May

Jun 88% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%59
July 202590%62
August 202594%62
September 202593%60
October 202594%62
November 202590%57
December 202592%60
January 202689%61
February 202691%56
March 202692%61
April 202693%58
May 202689%61
Departures on time
91%
Diverted
0.4%
Flights flown
719
Months covered
12

Keep nerding

Based on 729 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.