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Flight Reliability

WN 3571 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3571 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
14 min
Average arrival delay
3.9%
Cancelled
2 min early
Median arrival delay

Based on 304 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(41 flights)
  • Tue89%(35 flights)
  • Wed84%(37 flights)
  • Thu75%(40 flights)
  • Fri74%(42 flights)
  • Sat76%(41 flights)
  • Sun70%(56 flights)
On-time by departure window
  • 3–6 AM94%(47 flights)
  • 6–9 AM95%(64 flights)
  • 9 AM–12 PM91%(53 flights)
  • 12–3 PM82%(17 flights)
  • 3–6 PM—(6 flights)
  • 6–9 PM48%(98 flights)
  • 9 PM–12 AM—(7 flights)
On-time trend by month
90%
May

Jun 40% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202540%25
July 202552%27
August 202546%22
September 202557%21
October 202577%47
November 2025100%28
December 2025100%31
March 202660%10
April 202694%35
May 202690%39
Departures on time
72%
Diverted
0%
Flights flown
292
Months covered
12

Keep nerding

Based on 304 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.