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Flight Reliability

DL 2556 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 2556 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

81%
Arrive within 15 minutes
6 min
Average arrival delay
1.7%
Cancelled
4 min early
Median arrival delay

Based on 522 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(71 flights)
  • Tue85%(73 flights)
  • Wed84%(75 flights)
  • Thu78%(73 flights)
  • Fri85%(73 flights)
  • Sat80%(71 flights)
  • Sun72%(75 flights)
On-time by departure window
  • 3–6 AM100%(12 flights)
  • 6–9 AM83%(286 flights)
  • 9 AM–12 PM76%(33 flights)
  • 12–3 PM79%(164 flights)
  • 3–6 PM69%(16 flights)
On-time trend by month
100%
May

Jun 79% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%58
July 202578%60
August 202573%62
September 202590%59
October 202598%62
November 202576%59
December 202575%48
January 202659%29
February 202691%11
March 202674%23
April 202689%28
May 2026100%12
Departures on time
87%
Diverted
0.4%
Flights flown
511
Months covered
12

Keep nerding

Based on 522 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.