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Flight Reliability

WN 523 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 523 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
5 min
Average arrival delay
0.5%
Cancelled
4 min early
Median arrival delay

Based on 394 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(60 flights)
  • Tue84%(62 flights)
  • Wed84%(63 flights)
  • Thu80%(59 flights)
  • Fri75%(56 flights)
  • Sat80%(51 flights)
  • Sun80%(40 flights)
On-time by departure window
  • 3–6 AM100%(33 flights)
  • 6–9 AM92%(71 flights)
  • 9 AM–12 PM82%(127 flights)
  • 12–3 PM75%(51 flights)
  • 3–6 PM71%(49 flights)
  • 6–9 PM63%(48 flights)
  • 9 PM–12 AM58%(12 flights)
On-time trend by month
100%
May

Jun 75% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%73
July 202575%83
August 202579%24
September 202594%17
October 202590%39
November 202574%31
December 202563%30
January 202685%13
February 202667%21
March 2026100%31
April 202688%17
May 2026100%12
Departures on time
78%
Diverted
0.3%
Flights flown
391
Months covered
12

Keep nerding

Based on 394 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.