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Flight Reliability

WN 538 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 538 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

87%
Arrive within 15 minutes
3 min early
Average arrival delay
0%
Cancelled
10 min early
Median arrival delay

Based on 281 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon95%(42 flights)
  • Tue87%(46 flights)
  • Wed89%(46 flights)
  • Thu83%(41 flights)
  • Fri85%(40 flights)
  • Sat90%(30 flights)
  • Sun78%(36 flights)
On-time by departure window
  • 3–6 AM100%(24 flights)
  • 6–9 AM100%(54 flights)
  • 9 AM–12 PM87%(23 flights)
  • 12–3 PM86%(114 flights)
  • 3–6 PM86%(28 flights)
  • 6–9 PM50%(10 flights)
  • 9 PM–12 AM68%(28 flights)
On-time trend by month
84%
Feb

Jun 79% → Feb 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%28
July 202581%26
August 202585%26
September 202585%26
October 202550%10
November 2025100%17
December 2025100%25
January 202694%52
February 202684%62
Departures on time
83%
Diverted
0%
Flights flown
281
Months covered
10

Keep nerding

Based on 281 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.