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Flight Reliability

WN 1140 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1140 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

89%
Arrive within 15 minutes
3 min early
Average arrival delay
0.9%
Cancelled
8 min early
Median arrival delay

Based on 350 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(47 flights)
  • Tue89%(52 flights)
  • Wed87%(52 flights)
  • Thu96%(47 flights)
  • Fri87%(47 flights)
  • Sat93%(54 flights)
  • Sun85%(47 flights)
On-time by departure window
  • 3–6 AM95%(41 flights)
  • 6–9 AM94%(114 flights)
  • 9 AM–12 PM89%(91 flights)
  • 12–3 PM89%(70 flights)
  • 3–6 PM60%(10 flights)
  • 6–9 PM70%(20 flights)
On-time trend by month
90%
May

Jun 89% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%28
July 202597%30
August 202572%18
September 202592%13
October 202577%31
November 202594%16
December 202582%27
January 202693%30
February 202697%31
March 202694%31
April 202691%43
May 202690%48
Departures on time
89%
Diverted
0.3%
Flights flown
346
Months covered
12

Keep nerding

Based on 350 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.