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Flight Reliability

DL 3559 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3559 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

94%
Arrive within 15 minutes
8 min early
Average arrival delay
0%
Cancelled
12 min early
Median arrival delay

Based on 448 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon96%(66 flights)
  • Tue99%(66 flights)
  • Wed100%(66 flights)
  • Thu88%(64 flights)
  • Fri90%(62 flights)
  • Sat90%(60 flights)
  • Sun92%(64 flights)
On-time by departure window
  • 6–9 AM93%(198 flights)
  • 9 AM–12 PM93%(200 flights)
  • 12–3 PM96%(50 flights)
On-time trend by month
83%
May

Jun 95% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202595%60
July 202592%62
August 202598%62
September 202592%60
October 202588%60
November 202595%58
December 202592%38
April 2026100%36
May 202683%12
Departures on time
94%
Diverted
0%
Flights flown
448
Months covered
9

Keep nerding

Based on 448 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.