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Flight Reliability

DL 1605 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1605 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

82%
Arrive within 15 minutes
2 min
Average arrival delay
0.7%
Cancelled
10 min early
Median arrival delay

Based on 428 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(63 flights)
  • Tue87%(63 flights)
  • Wed89%(65 flights)
  • Thu88%(65 flights)
  • Fri79%(66 flights)
  • Sat74%(42 flights)
  • Sun82%(60 flights)
On-time by departure window
  • 9 AM–12 PM—(9 flights)
  • 12–3 PM86%(56 flights)
  • 3–6 PM82%(352 flights)
  • 6–9 PM—(7 flights)
On-time trend by month
96%
May

Jun 84% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%56
July 202559%53
August 202581%36
September 202597%29
October 202590%31
November 202586%29
December 202571%41
January 202686%29
February 202677%22
March 202681%26
April 202689%28
May 202696%44
Departures on time
81%
Diverted
0.2%
Flights flown
424
Months covered
12

Keep nerding

Based on 428 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.