Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 4089 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4089 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

90%
Arrive within 15 minutes
4 min early
Average arrival delay
0%
Cancelled
11 min early
Median arrival delay

Based on 186 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon95%(21 flights)
  • Tue84%(31 flights)
  • Wed87%(31 flights)
  • Thu95%(20 flights)
  • Fri100%(20 flights)
  • Sat91%(32 flights)
  • Sun83%(30 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM93%(42 flights)
  • 9 AM–12 PM—(2 flights)
  • 12–3 PM92%(118 flights)
  • 3–6 PM75%(12 flights)
  • 6–9 PM—(9 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
95%
Dec

Jun 100% → Dec 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%27
July 202597%31
August 202565%20
September 202588%17
October 202587%31
November 202596%27
December 202595%19
Departures on time
90%
Diverted
0.5%
Flights flown
185
Months covered
11

Keep nerding

Based on 186 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.