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Flight Reliability

WN 3135 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3135 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

72%
Arrive within 15 minutes
11 min
Average arrival delay
0.7%
Cancelled
1 min early
Median arrival delay

Based on 290 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(45 flights)
  • Tue71%(42 flights)
  • Wed69%(42 flights)
  • Thu69%(42 flights)
  • Fri76%(42 flights)
  • Sat63%(41 flights)
  • Sun81%(32 flights)
On-time by departure window
  • 3–6 AM96%(26 flights)
  • 6–9 AM93%(60 flights)
  • 9 AM–12 PM88%(25 flights)
  • 12–3 PM66%(58 flights)
  • 3–6 PM68%(56 flights)
  • 6–9 PM50%(18 flights)
  • 9 PM–12 AM44%(43 flights)
On-time trend by month
68%
Mar

Jun 58% → Mar 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%38
July 202549%43
August 202560%20
September 202594%17
October 202573%30
November 202589%28
December 202574%31
January 202685%27
February 2026100%26
March 202668%22
Departures on time
69%
Diverted
0.7%
Flights flown
286
Months covered
11

Keep nerding

Based on 290 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.