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Flight Reliability

WN 591 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 591 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

86%
Arrive within 15 minutes
2 min early
Average arrival delay
0.3%
Cancelled
9 min early
Median arrival delay

Based on 352 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(52 flights)
  • Tue91%(46 flights)
  • Wed94%(46 flights)
  • Thu88%(51 flights)
  • Fri88%(51 flights)
  • Sat86%(51 flights)
  • Sun76%(53 flights)
On-time by departure window
  • 3–6 AM92%(12 flights)
  • 6–9 AM95%(172 flights)
  • 9 AM–12 PM89%(53 flights)
  • 12–3 PM77%(85 flights)
  • 3–6 PM53%(17 flights)
  • 6–9 PM55%(11 flights)
On-time trend by month
88%
May

Jun 60% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%25
July 202583%24
August 202591%35
September 2025100%34
October 202570%27
November 202577%30
December 202574%31
January 202687%31
February 2026100%28
March 202696%24
April 2026100%29
May 202688%32
Departures on time
85%
Diverted
0.3%
Flights flown
350
Months covered
12

Keep nerding

Based on 352 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.