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Flight Reliability

WN 4212 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4212 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

76%
Arrive within 15 minutes
5 min
Average arrival delay
1.0%
Cancelled
4 min early
Median arrival delay

Based on 200 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(33 flights)
  • Tue82%(34 flights)
  • Wed77%(35 flights)
  • Thu61%(31 flights)
  • Fri78%(32 flights)
  • Sat93%(14 flights)
  • Sun78%(18 flights)
On-time by departure window
  • 9 AM–12 PM87%(37 flights)
  • 12–3 PM65%(23 flights)
  • 3–6 PM82%(11 flights)
  • 6–9 PM56%(63 flights)
  • 9 PM–12 AM94%(63 flights)
On-time trend by month
48%
May

Aug 36% → May 48% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202536%11
September 202592%13
November 202596%28
December 202593%29
January 202674%27
February 202682%27
March 202678%18
April 202657%21
May 202648%21
Departures on time
70%
Diverted
0.5%
Flights flown
197
Months covered
10

Keep nerding

Based on 200 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.