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Flight Reliability

WN 597 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 597 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

73%
Arrive within 15 minutes
12 min
Average arrival delay
1.6%
Cancelled
2 min early
Median arrival delay

Based on 434 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(65 flights)
  • Tue76%(72 flights)
  • Wed83%(71 flights)
  • Thu74%(57 flights)
  • Fri64%(63 flights)
  • Sat72%(36 flights)
  • Sun62%(63 flights)
On-time by departure window
  • 3–6 AM—(2 flights)
  • 6–9 AM89%(36 flights)
  • 9 AM–12 PM88%(88 flights)
  • 12–3 PM71%(115 flights)
  • 3–6 PM83%(46 flights)
  • 6–9 PM61%(100 flights)
  • 9 PM–12 AM45%(40 flights)
On-time trend by month
52%
May

Jun 68% → May 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%38
July 202567%39
August 202578%41
September 202582%39
October 202593%30
November 202582%33
December 202570%47
January 202687%52
February 202690%19
March 202645%29
April 202652%29
May 202652%31
Departures on time
66%
Diverted
0%
Flights flown
427
Months covered
12

Keep nerding

Based on 434 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.