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Flight Reliability

WN 3535 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3535 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

85%
Arrive within 15 minutes
1 min
Average arrival delay
0.9%
Cancelled
6 min early
Median arrival delay

Based on 334 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon96%(45 flights)
  • Tue82%(56 flights)
  • Wed86%(58 flights)
  • Thu78%(45 flights)
  • Fri85%(41 flights)
  • Sat87%(37 flights)
  • Sun80%(49 flights)
On-time by departure window
  • 6–9 AM94%(119 flights)
  • 9 AM–12 PM88%(104 flights)
  • 12–3 PM63%(38 flights)
  • 3–6 PM85%(47 flights)
  • 6–9 PM57%(23 flights)
On-time trend by month
100%
May

Jun 86% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 202581%31
August 202592%39
September 202582%39
October 202558%26
November 2025100%33
December 202587%31
January 202696%28
February 2026100%28
March 202654%26
April 202673%11
May 2026100%10
Departures on time
80%
Diverted
0%
Flights flown
331
Months covered
12

Keep nerding

Based on 334 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.