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Flight Reliability

WN 539 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 539 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

75%
Arrive within 15 minutes
9 min
Average arrival delay
0.7%
Cancelled
0 min
Median arrival delay

Based on 417 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(69 flights)
  • Tue84%(55 flights)
  • Wed79%(56 flights)
  • Thu70%(70 flights)
  • Fri68%(71 flights)
  • Sat79%(38 flights)
  • Sun76%(55 flights)
On-time by departure window
  • 6–9 AM86%(59 flights)
  • 9 AM–12 PM85%(87 flights)
  • 12–3 PM88%(32 flights)
  • 3–6 PM66%(149 flights)
  • 6–9 PM64%(72 flights)
  • 9 PM–12 AM80%(15 flights)
On-time trend by month
90%
May

Jun 68% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%34
July 202565%34
August 202570%43
September 202558%43
October 202549%35
November 202585%27
December 202572%29
January 202697%29
February 202680%35
March 202686%43
April 202691%32
May 202690%30
Departures on time
68%
Diverted
0%
Flights flown
414
Months covered
12

Keep nerding

Based on 417 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.