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Flight Reliability

DL 5159 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5159 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

71%
Arrive within 15 minutes
15 min
Average arrival delay
0.6%
Cancelled
7 min early
Median arrival delay

Based on 328 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(50 flights)
  • Tue69%(45 flights)
  • Wed83%(46 flights)
  • Thu71%(49 flights)
  • Fri63%(49 flights)
  • Sat77%(35 flights)
  • Sun65%(52 flights)
On-time by departure window
  • 6–9 AM69%(16 flights)
  • 12–3 PM76%(180 flights)
  • 3–6 PM68%(66 flights)
  • 6–9 PM59%(64 flights)
On-time trend by month
50%
May

Jun 52% → May 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202552%33
July 202581%37
August 202582%22
September 202588%17
October 202581%26
November 202574%19
December 202577%31
January 202654%43
February 202683%35
March 202655%20
April 202680%25
May 202650%18
Departures on time
73%
Diverted
0%
Flights flown
326
Months covered
12

Keep nerding

Based on 328 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.