Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 1623 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1623 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

75%
Arrive within 15 minutes
12 min
Average arrival delay
1.7%
Cancelled
1 min early
Median arrival delay

Based on 419 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(57 flights)
  • Tue89%(62 flights)
  • Wed84%(63 flights)
  • Thu66%(62 flights)
  • Fri70%(59 flights)
  • Sat77%(60 flights)
  • Sun57%(49 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM90%(57 flights)
  • 9 AM–12 PM95%(39 flights)
  • 12–3 PM79%(72 flights)
  • 3–6 PM76%(76 flights)
  • 6–9 PM64%(137 flights)
  • 9 PM–12 AM50%(30 flights)
On-time trend by month
69%
May

Jun 69% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%29
July 202567%30
August 202583%52
September 202581%52
October 202588%32
November 2025100%26
December 202584%32
January 202676%29
February 202669%26
March 202650%30
April 202654%35
May 202669%39
Departures on time
70%
Diverted
0%
Flights flown
412
Months covered
12

Keep nerding

Based on 419 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.