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Flight Reliability

WN 4253 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4253 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

71%
Arrive within 15 minutes
17 min
Average arrival delay
1.0%
Cancelled
3 min early
Median arrival delay

Based on 210 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon62%(29 flights)
  • Tue71%(21 flights)
  • Wed79%(19 flights)
  • Thu63%(30 flights)
  • Fri63%(30 flights)
  • Sat88%(48 flights)
  • Sun65%(31 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM91%(86 flights)
  • 12–3 PM90%(29 flights)
  • 3–6 PM—(2 flights)
  • 6–9 PM45%(89 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
89%
May

Jun 50% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%20
July 202550%20
November 202558%26
December 202552%27
March 202686%28
April 202694%34
May 202689%36
Departures on time
65%
Diverted
0%
Flights flown
208
Months covered
10

Keep nerding

Based on 210 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.