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Flight Reliability

WN 588 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 588 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

76%
Arrive within 15 minutes
8 min
Average arrival delay
1.3%
Cancelled
1 min early
Median arrival delay

Based on 387 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(54 flights)
  • Tue75%(56 flights)
  • Wed66%(53 flights)
  • Thu90%(49 flights)
  • Fri80%(56 flights)
  • Sat81%(47 flights)
  • Sun74%(65 flights)
On-time by departure window
  • 3–6 AM93%(40 flights)
  • 6–9 AM88%(17 flights)
  • 9 AM–12 PM85%(103 flights)
  • 12–3 PM72%(68 flights)
  • 3–6 PM58%(64 flights)
  • 6–9 PM73%(88 flights)
On-time trend by month
63%
May

Jun 93% → May 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%29
July 202590%29
August 202587%31
September 202593%30
October 202570%30
November 202558%33
December 202563%30
January 202681%32
February 202678%27
March 202685%27
April 202667%39
May 202663%43
Departures on time
69%
Diverted
0.5%
Flights flown
380
Months covered
12

Keep nerding

Based on 387 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.