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Flight Reliability

WN 127 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 127 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

81%
Arrive within 15 minutes
5 min
Average arrival delay
0.7%
Cancelled
5 min early
Median arrival delay

Based on 448 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(70 flights)
  • Tue92%(63 flights)
  • Wed87%(62 flights)
  • Thu72%(67 flights)
  • Fri81%(64 flights)
  • Sat90%(60 flights)
  • Sun66%(58 flights)
On-time by departure window
  • 3–6 AM96%(28 flights)
  • 6–9 AM90%(128 flights)
  • 9 AM–12 PM84%(119 flights)
  • 12–3 PM78%(60 flights)
  • 3–6 PM63%(27 flights)
  • 6–9 PM56%(32 flights)
  • 9 PM–12 AM68%(50 flights)
On-time trend by month
45%
May

Jun 84% → May 45% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%64
July 202590%67
August 202586%35
September 202580%30
October 202581%31
November 202593%27
December 202592%36
January 202690%29
February 202673%26
March 202667%36
April 202675%32
May 202645%31
Departures on time
78%
Diverted
0.2%
Flights flown
444
Months covered
12

Keep nerding

Based on 448 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.