Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 4289 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4289 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
4 min
Average arrival delay
1.7%
Cancelled
5 min early
Median arrival delay

Based on 303 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(43 flights)
  • Tue86%(36 flights)
  • Wed94%(33 flights)
  • Thu79%(43 flights)
  • Fri70%(43 flights)
  • Sat83%(63 flights)
  • Sun83%(36 flights)
On-time by departure window
  • 6–9 AM90%(60 flights)
  • 9 AM–12 PM88%(144 flights)
  • 12–3 PM—(2 flights)
  • 3–6 PM47%(43 flights)
  • 6–9 PM—(9 flights)
  • 9 PM–12 AM87%(39 flights)
On-time trend by month
91%
May

Jun 46% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%28
July 202557%30
August 202587%39
September 2025100%37
October 202587%31
January 202693%28
February 202689%28
March 202671%21
April 202680%20
May 202691%23
Departures on time
79%
Diverted
0.3%
Flights flown
297
Months covered
12

Keep nerding

Based on 303 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.