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Flight Reliability

WN 4229 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4229 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

64%
Arrive within 15 minutes
14 min
Average arrival delay
1.9%
Cancelled
1 min
Median arrival delay

Based on 270 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(41 flights)
  • Tue67%(27 flights)
  • Wed75%(24 flights)
  • Thu57%(37 flights)
  • Fri57%(42 flights)
  • Sat88%(40 flights)
  • Sun37%(54 flights)
On-time by departure window
  • 6–9 AM100%(35 flights)
  • 9 AM–12 PM77%(43 flights)
  • 12–3 PM46%(24 flights)
  • 3–6 PM62%(84 flights)
  • 6–9 PM43%(58 flights)
  • 9 PM–12 AM62%(21 flights)
On-time trend by month
73%
May

Jun 56% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202556%16
July 202567%12
November 202574%27
December 202550%38
January 202685%34
February 202667%43
March 202657%47
April 202644%23
May 202673%22
Departures on time
60%
Diverted
0%
Flights flown
265
Months covered
10

Keep nerding

Based on 270 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.