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Flight Reliability

WN 123 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 123 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
4 min
Average arrival delay
0%
Cancelled
3 min early
Median arrival delay

Based on 408 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(66 flights)
  • Tue75%(52 flights)
  • Wed87%(52 flights)
  • Thu80%(64 flights)
  • Fri81%(62 flights)
  • Sat82%(62 flights)
  • Sun82%(49 flights)
On-time by departure window
  • 3–6 AM100%(19 flights)
  • 6–9 AM98%(125 flights)
  • 9 AM–12 PM79%(98 flights)
  • 12–3 PM—(7 flights)
  • 3–6 PM52%(67 flights)
  • 6–9 PM73%(91 flights)
On-time trend by month
65%
May

Jun 69% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%54
July 202578%54
August 202579%24
September 2025100%17
October 202590%31
November 2025100%28
December 202579%29
January 202687%31
February 202678%18
March 202676%42
April 202682%39
May 202665%40
Departures on time
78%
Diverted
0.2%
Flights flown
407
Months covered
12

Keep nerding

Based on 408 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.