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Flight Reliability

WN 4574 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4574 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

91%
Arrive within 15 minutes
3 min early
Average arrival delay
2.1%
Cancelled
7 min early
Median arrival delay

Based on 286 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon92%(48 flights)
  • Tue96%(27 flights)
  • Wed96%(26 flights)
  • Thu94%(51 flights)
  • Fri87%(52 flights)
  • Sat86%(42 flights)
  • Sun88%(34 flights)
On-time by departure window
  • 3–6 AM—(5 flights)
  • 6–9 AM92%(118 flights)
  • 9 AM–12 PM92%(128 flights)
  • 12–3 PM90%(10 flights)
  • 3–6 PM—(1 flights)
  • 9 PM–12 AM72%(18 flights)
On-time trend by month
83%
May

Jun 88% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%34
July 202590%40
November 202581%16
January 202693%54
February 202695%76
March 2026100%10
April 2026100%16
May 202683%23
Departures on time
89%
Diverted
0%
Flights flown
280
Months covered
10

Keep nerding

Based on 286 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.