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Flight Reliability

WN 1227 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1227 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
9 min
Average arrival delay
0.3%
Cancelled
2 min early
Median arrival delay

Based on 370 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(55 flights)
  • Tue75%(47 flights)
  • Wed82%(44 flights)
  • Thu74%(54 flights)
  • Fri77%(57 flights)
  • Sat81%(42 flights)
  • Sun80%(69 flights)
On-time by departure window
  • 3–6 AM100%(17 flights)
  • 6–9 AM93%(71 flights)
  • 9 AM–12 PM96%(68 flights)
  • 12–3 PM74%(80 flights)
  • 3–6 PM48%(69 flights)
  • 6–9 PM75%(16 flights)
  • 9 PM–12 AM72%(47 flights)
On-time trend by month
71%
May

Jun 64% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%33
July 202588%34
August 202591%34
September 2025100%34
October 202523%26
November 202587%30
December 202590%38
January 202693%15
February 2026100%19
March 202659%41
April 202676%33
May 202671%31
Departures on time
70%
Diverted
0.3%
Flights flown
368
Months covered
12

Keep nerding

Based on 370 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.