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Flight Reliability

WN 3958 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3958 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
13 min
Average arrival delay
0.9%
Cancelled
2 min early
Median arrival delay

Based on 327 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon69%(49 flights)
  • Tue67%(33 flights)
  • Wed63%(35 flights)
  • Thu66%(53 flights)
  • Fri78%(54 flights)
  • Sat87%(38 flights)
  • Sun66%(61 flights)
On-time by departure window
  • 3–6 AM90%(79 flights)
  • 6–9 AM91%(33 flights)
  • 9 AM–12 PM85%(26 flights)
  • 12–3 PM73%(99 flights)
  • 3–6 PM34%(32 flights)
  • 6–9 PM40%(53 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
59%
May

Jun 100% → May 59% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%21
July 202591%21
August 202594%18
September 2025100%17
October 202580%45
November 202544%27
December 202543%28
January 202673%22
February 202674%19
March 202671%24
April 202657%37
May 202659%44
Departures on time
72%
Diverted
0.3%
Flights flown
323
Months covered
12

Keep nerding

Based on 327 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.