Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 434 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 434 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

76%
Arrive within 15 minutes
11 min
Average arrival delay
0.7%
Cancelled
0 min
Median arrival delay

Based on 407 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(58 flights)
  • Tue81%(67 flights)
  • Wed75%(68 flights)
  • Thu68%(60 flights)
  • Fri73%(56 flights)
  • Sat81%(41 flights)
  • Sun69%(54 flights)
On-time by departure window
  • 6–9 AM84%(76 flights)
  • 9 AM–12 PM90%(48 flights)
  • 12–3 PM74%(139 flights)
  • 3–6 PM74%(91 flights)
  • 6–9 PM55%(49 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
85%
May

Jun 68% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%34
July 202565%34
August 202562%26
September 202581%26
October 202583%18
November 202576%46
December 202571%51
January 202682%34
February 202693%28
March 202670%30
April 202676%37
May 202685%40
Departures on time
72%
Diverted
0%
Flights flown
404
Months covered
12

Keep nerding

Based on 407 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.