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Flight Reliability

DL 5209 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5209 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
5 min
Average arrival delay
2.8%
Cancelled
10 min early
Median arrival delay

Based on 354 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(51 flights)
  • Tue89%(53 flights)
  • Wed79%(52 flights)
  • Thu81%(47 flights)
  • Fri88%(48 flights)
  • Sat87%(45 flights)
  • Sun85%(48 flights)
On-time by departure window
  • 6–9 AM—(6 flights)
  • 9 AM–12 PM88%(25 flights)
  • 12–3 PM83%(57 flights)
  • 3–6 PM89%(54 flights)
  • 6–9 PM73%(11 flights)
  • 9 PM–12 AM82%(191 flights)
On-time trend by month
91%
Apr

Jun 79% → Apr 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%34
July 202574%31
August 202594%31
September 202587%30
October 202597%31
November 202586%28
December 202570%37
January 202679%61
February 202691%22
March 202683%12
April 202691%21
Departures on time
81%
Diverted
0%
Flights flown
344
Months covered
12

Keep nerding

Based on 354 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.