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Flight Reliability

WN 2556 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 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

85%
Arrive within 15 minutes
1 min
Average arrival delay
0.3%
Cancelled
7 min early
Median arrival delay

Based on 381 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(55 flights)
  • Tue90%(48 flights)
  • Wed94%(48 flights)
  • Thu71%(56 flights)
  • Fri84%(57 flights)
  • Sat88%(60 flights)
  • Sun85%(54 flights)
On-time by departure window
  • 3–6 AM97%(33 flights)
  • 6–9 AM88%(115 flights)
  • 9 AM–12 PM85%(61 flights)
  • 12–3 PM85%(60 flights)
  • 3–6 PM79%(33 flights)
  • 6–9 PM76%(76 flights)
On-time trend by month
88%
May

Jun 97% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%29
July 202594%31
August 202573%30
September 202590%30
October 202581%31
November 202581%42
December 202589%37
January 202675%32
February 202678%18
March 202655%11
April 202692%39
May 202688%48
Departures on time
79%
Diverted
0.5%
Flights flown
378
Months covered
12

Keep nerding

Based on 381 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.