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Flight Reliability

WN 3537 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3537 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

82%
Arrive within 15 minutes
0 min
Average arrival delay
0.9%
Cancelled
7 min early
Median arrival delay

Based on 225 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(30 flights)
  • Tue82%(34 flights)
  • Wed91%(34 flights)
  • Thu73%(33 flights)
  • Fri89%(35 flights)
  • Sat77%(26 flights)
  • Sun84%(31 flights)
On-time by departure window
  • 3–6 AM97%(34 flights)
  • 6–9 AM86%(29 flights)
  • 9 AM–12 PM84%(50 flights)
  • 12–3 PM88%(42 flights)
  • 3–6 PM67%(12 flights)
  • 6–9 PM68%(56 flights)
On-time trend by month
55%
May

Jun 92% → May 55% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%26
July 202594%31
August 202585%33
September 202597%35
November 202582%17
March 202682%11
April 202670%27
May 202655%31
Departures on time
79%
Diverted
0%
Flights flown
223
Months covered
11

Keep nerding

Based on 225 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.