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Flight Reliability

WN 1588 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1588 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

77%
Arrive within 15 minutes
6 min
Average arrival delay
1.5%
Cancelled
4 min early
Median arrival delay

Based on 335 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(37 flights)
  • Tue77%(48 flights)
  • Wed78%(45 flights)
  • Thu69%(36 flights)
  • Fri86%(44 flights)
  • Sat78%(58 flights)
  • Sun77%(62 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM97%(29 flights)
  • 9 AM–12 PM76%(92 flights)
  • 12–3 PM72%(128 flights)
  • 3–6 PM83%(58 flights)
  • 6–9 PM78%(18 flights)
  • 9 PM–12 AM—(4 flights)
On-time trend by month
26%
May

Jun 77% → May 26% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%22
July 202584%19
August 202585%27
September 202577%30
October 202567%18
November 202591%32
December 202576%21
January 202697%31
February 202693%28
March 202690%39
April 202659%32
May 202626%31
Departures on time
75%
Diverted
0%
Flights flown
330
Months covered
12

Keep nerding

Based on 335 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.