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Flight Reliability

WN 2578 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 2578 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

74%
Arrive within 15 minutes
11 min
Average arrival delay
0.5%
Cancelled
0 min
Median arrival delay

Based on 369 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(57 flights)
  • Tue70%(46 flights)
  • Wed80%(44 flights)
  • Thu60%(53 flights)
  • Fri74%(54 flights)
  • Sat84%(50 flights)
  • Sun76%(62 flights)
On-time by departure window
  • 6–9 AM80%(10 flights)
  • 9 AM–12 PM87%(46 flights)
  • 12–3 PM78%(37 flights)
  • 3–6 PM78%(139 flights)
  • 6–9 PM67%(98 flights)
  • 9 PM–12 AM56%(36 flights)
On-time trend by month
81%
May

Jun 51% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202551%43
July 202542%43
August 202572%36
September 202588%34
October 202597%38
November 202577%17
December 202533%15
January 202689%28
February 202686%21
March 202687%30
April 202687%30
May 202681%31
Departures on time
63%
Diverted
0.3%
Flights flown
366
Months covered
12

Keep nerding

Based on 369 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.