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Flight Reliability

WN 4273 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4273 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

88%
Arrive within 15 minutes
3 min early
Average arrival delay
0%
Cancelled
7 min early
Median arrival delay

Based on 239 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon91%(34 flights)
  • Tue93%(30 flights)
  • Wed97%(30 flights)
  • Thu85%(34 flights)
  • Fri83%(35 flights)
  • Sat74%(31 flights)
  • Sun91%(45 flights)
On-time by departure window
  • 3–6 AM96%(50 flights)
  • 6–9 AM—(3 flights)
  • 9 AM–12 PM85%(123 flights)
  • 12–3 PM90%(40 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM79%(14 flights)
On-time trend by month
86%
May

Jun 92% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%12
July 202592%12
October 202589%18
November 2025100%27
December 202597%31
January 202681%31
February 202664%28
March 202690%31
April 202692%24
May 202686%22
Departures on time
84%
Diverted
0%
Flights flown
239
Months covered
11

Keep nerding

Based on 239 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.