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Flight Reliability

WN 4371 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4371 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

74%
Arrive within 15 minutes
11 min
Average arrival delay
0.4%
Cancelled
0 min
Median arrival delay

Based on 262 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(42 flights)
  • Tue74%(34 flights)
  • Wed85%(33 flights)
  • Thu81%(41 flights)
  • Fri74%(42 flights)
  • Sat65%(26 flights)
  • Sun62%(42 flights)
On-time by departure window
  • 9 AM–12 PM89%(28 flights)
  • 12–3 PM56%(39 flights)
  • 3–6 PM85%(13 flights)
  • 6–9 PM72%(58 flights)
  • 9 PM–12 AM75%(122 flights)
On-time trend by month
64%
May

Jun 54% → May 64% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%26
July 202555%31
August 202589%18
September 202582%17
November 2025100%28
December 202594%31
January 202684%31
February 202661%28
April 202657%21
May 202664%25
Departures on time
74%
Diverted
0.4%
Flights flown
260
Months covered
11

Keep nerding

Based on 262 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.