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Flight Reliability

WN 579 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 579 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
9 min
Average arrival delay
0.5%
Cancelled
5 min early
Median arrival delay

Based on 385 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(50 flights)
  • Tue85%(54 flights)
  • Wed91%(56 flights)
  • Thu63%(51 flights)
  • Fri77%(51 flights)
  • Sat76%(45 flights)
  • Sun57%(75 flights)
On-time by departure window
  • 3–6 AM95%(37 flights)
  • 6–9 AM96%(26 flights)
  • 9 AM–12 PM90%(30 flights)
  • 12–3 PM76%(54 flights)
  • 3–6 PM58%(81 flights)
  • 6–9 PM74%(123 flights)
  • 9 PM–12 AM52%(31 flights)
On-time trend by month
32%
May

Jun 71% → May 32% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%17
July 202572%18
August 202573%33
September 202588%34
October 202590%31
November 202590%31
December 202574%31
January 202693%27
February 202673%40
March 202676%50
April 202658%36
May 202632%34
Departures on time
67%
Diverted
0.3%
Flights flown
382
Months covered
12

Keep nerding

Based on 385 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.