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Flight Reliability

WN 1123 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1123 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

77%
Arrive within 15 minutes
10 min
Average arrival delay
0.9%
Cancelled
0 min
Median arrival delay

Based on 328 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(55 flights)
  • Tue71%(38 flights)
  • Wed64%(36 flights)
  • Thu83%(57 flights)
  • Fri81%(59 flights)
  • Sat90%(38 flights)
  • Sun69%(42 flights)
On-time by departure window
  • 3–6 AM—(7 flights)
  • 6–9 AM98%(59 flights)
  • 9 AM–12 PM89%(55 flights)
  • 12–3 PM63%(71 flights)
  • 3–6 PM70%(60 flights)
  • 6–9 PM77%(60 flights)
  • 9 PM–12 AM31%(13 flights)
On-time trend by month
91%
May

Jun 76% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%21
July 202570%23
August 202582%28
September 202587%30
October 202580%44
November 202565%17
December 202540%15
January 202686%29
February 202693%28
March 202674%42
April 202656%25
May 202691%23
Departures on time
71%
Diverted
0%
Flights flown
325
Months covered
12

Keep nerding

Based on 328 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.