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Flight Reliability

WN 158 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 158 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
0.5%
Cancelled
4 min early
Median arrival delay

Based on 389 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(52 flights)
  • Tue86%(55 flights)
  • Wed84%(56 flights)
  • Thu76%(55 flights)
  • Fri78%(54 flights)
  • Sat89%(47 flights)
  • Sun80%(66 flights)
On-time by departure window
  • 3–6 AM—(4 flights)
  • 6–9 AM96%(50 flights)
  • 9 AM–12 PM86%(59 flights)
  • 12–3 PM93%(99 flights)
  • 3–6 PM75%(68 flights)
  • 6–9 PM64%(105 flights)
On-time trend by month
72%
May

Jun 73% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202543%30
August 202581%26
September 202592%25
October 202594%34
November 202590%29
December 202594%31
January 202693%42
February 202686%35
March 202678%40
April 202677%31
May 202672%32
Departures on time
78%
Diverted
0.5%
Flights flown
385
Months covered
12

Keep nerding

Based on 389 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.