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Flight Reliability

WN 931 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 931 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

80%
Arrive within 15 minutes
7 min
Average arrival delay
0.9%
Cancelled
3 min early
Median arrival delay

Based on 336 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(49 flights)
  • Tue87%(37 flights)
  • Wed91%(35 flights)
  • Thu74%(46 flights)
  • Fri70%(50 flights)
  • Sat85%(46 flights)
  • Sun80%(70 flights)
On-time by departure window
  • 3–6 AM—(7 flights)
  • 6–9 AM93%(95 flights)
  • 9 AM–12 PM85%(108 flights)
  • 12–3 PM72%(72 flights)
  • 3–6 PM54%(43 flights)
  • 6–9 PM—(8 flights)
On-time trend by month
79%
May

Jun 89% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%37
July 202582%34
August 202593%42
September 202567%42
October 202577%26
November 202547%15
December 202546%13
January 202689%27
February 202696%28
March 202680%30
April 202675%20
May 202679%19
Departures on time
76%
Diverted
0%
Flights flown
333
Months covered
12

Keep nerding

Based on 336 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.