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Flight Reliability

WN 3558 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3558 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

71%
Arrive within 15 minutes
16 min
Average arrival delay
0.7%
Cancelled
1 min
Median arrival delay

Based on 295 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon65%(52 flights)
  • Tue74%(35 flights)
  • Wed77%(35 flights)
  • Thu58%(50 flights)
  • Fri72%(50 flights)
  • Sat77%(44 flights)
  • Sun85%(27 flights)
On-time by departure window
  • 6–9 AM84%(117 flights)
  • 9 AM–12 PM94%(17 flights)
  • 12–3 PM62%(63 flights)
  • 3–6 PM60%(47 flights)
  • 6–9 PM57%(49 flights)
On-time trend by month
53%
May

Jun 75% → May 53% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%44
July 202584%43
August 202554%39
September 202564%39
November 202596%28
December 202571%31
April 202670%27
May 202653%34
Departures on time
67%
Diverted
0%
Flights flown
293
Months covered
11

Keep nerding

Based on 295 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.