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Flight Reliability

WN 4623 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4623 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

81%
Arrive within 15 minutes
5 min
Average arrival delay
1.1%
Cancelled
3 min early
Median arrival delay

Based on 375 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(76 flights)
  • Tue79%(28 flights)
  • Wed72%(32 flights)
  • Thu77%(78 flights)
  • Fri86%(71 flights)
  • Sat90%(41 flights)
  • Sun84%(44 flights)
On-time by departure window
  • 6–9 AM93%(110 flights)
  • 9 AM–12 PM85%(74 flights)
  • 12–3 PM67%(69 flights)
  • 3–6 PM70%(46 flights)
  • 6–9 PM81%(70 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
67%
May

Jun 78% → May 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%27
July 202578%27
August 202576%41
September 202574%43
October 202576%25
November 202581%48
December 202585%40
January 202691%35
February 202694%33
March 202688%17
April 202688%16
May 202667%18
Departures on time
77%
Diverted
0.3%
Flights flown
370
Months covered
12

Keep nerding

Based on 375 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.