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Flight Reliability

WN 1587 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1587 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

85%
Arrive within 15 minutes
0 min
Average arrival delay
0.8%
Cancelled
5 min early
Median arrival delay

Based on 379 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(59 flights)
  • Tue95%(43 flights)
  • Wed89%(44 flights)
  • Thu80%(60 flights)
  • Fri75%(57 flights)
  • Sat82%(54 flights)
  • Sun85%(58 flights)
On-time by departure window
  • 3–6 AM—(2 flights)
  • 6–9 AM96%(93 flights)
  • 9 AM–12 PM77%(81 flights)
  • 12–3 PM88%(94 flights)
  • 3–6 PM82%(34 flights)
  • 6–9 PM85%(47 flights)
  • 9 PM–12 AM54%(24 flights)
On-time trend by month
90%
May

Jun 100% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%31
July 202587%30
August 202597%29
September 202597%30
October 2025100%30
November 202585%33
December 202574%35
January 202672%29
February 202667%24
March 202666%29
April 202677%35
May 202690%40
Departures on time
79%
Diverted
0.3%
Flights flown
375
Months covered
12

Keep nerding

Based on 379 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.