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Flight Reliability

DL 1584 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1584 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

75%
Arrive within 15 minutes
10 min
Average arrival delay
0.7%
Cancelled
6 min early
Median arrival delay

Based on 288 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon63%(48 flights)
  • Tue83%(46 flights)
  • Wed82%(44 flights)
  • Thu75%(44 flights)
  • Fri83%(48 flights)
  • Sat—(8 flights)
  • Sun65%(48 flights)
On-time by departure window
  • 6–9 AM—(7 flights)
  • 12–3 PM83%(12 flights)
  • 3–6 PM77%(62 flights)
  • 6–9 PM74%(205 flights)
On-time trend by month
83%
May

Jun 36% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202536%25
July 202546%22
August 202585%20
September 202588%17
October 202576%21
November 202567%18
December 202583%35
January 202686%28
February 202691%23
March 202667%27
April 202692%26
May 202683%24
Departures on time
70%
Diverted
0%
Flights flown
286
Months covered
12

Keep nerding

Based on 288 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.