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Flight Reliability

WN 323 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 323 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

79%
Arrive within 15 minutes
7 min
Average arrival delay
0.9%
Cancelled
4 min early
Median arrival delay

Based on 320 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(38 flights)
  • Tue90%(51 flights)
  • Wed92%(51 flights)
  • Thu69%(39 flights)
  • Fri76%(37 flights)
  • Sat83%(46 flights)
  • Sun68%(53 flights)
On-time by departure window
  • 3–6 AM—(8 flights)
  • 6–9 AM89%(90 flights)
  • 9 AM–12 PM79%(24 flights)
  • 12–3 PM80%(35 flights)
  • 3–6 PM87%(67 flights)
  • 6–9 PM70%(77 flights)
  • 9 PM–12 AM29%(14 flights)
On-time trend by month
94%
May

Jun 60% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202543%30
August 202590%19
September 202594%17
October 202584%31
November 202579%29
December 202593%30
January 202696%26
February 202677%26
March 202668%19
April 202682%27
May 202694%31
Departures on time
74%
Diverted
0.6%
Flights flown
315
Months covered
12

Keep nerding

Based on 320 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.