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Flight Reliability

WN 140 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 140 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

78%
Arrive within 15 minutes
7 min
Average arrival delay
0.2%
Cancelled
4 min early
Median arrival delay

Based on 405 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(59 flights)
  • Tue80%(60 flights)
  • Wed84%(64 flights)
  • Thu73%(60 flights)
  • Fri72%(54 flights)
  • Sat76%(45 flights)
  • Sun82%(60 flights)
On-time by departure window
  • 3–6 AM93%(14 flights)
  • 6–9 AM92%(37 flights)
  • 9 AM–12 PM90%(110 flights)
  • 12–3 PM75%(60 flights)
  • 3–6 PM72%(57 flights)
  • 6–9 PM66%(103 flights)
  • 9 PM–12 AM57%(21 flights)
On-time trend by month
61%
May

Jun 86% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 202581%31
August 202557%30
September 202587%30
October 202596%22
November 202594%46
December 202572%57
January 202688%32
February 202684%25
March 202665%31
April 202670%33
May 202661%36
Departures on time
72%
Diverted
0.5%
Flights flown
402
Months covered
12

Keep nerding

Based on 405 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.