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Flight Reliability

WN 1728 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1728 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
10 min
Average arrival delay
0%
Cancelled
5 min early
Median arrival delay

Based on 402 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(57 flights)
  • Tue83%(57 flights)
  • Wed86%(56 flights)
  • Thu75%(56 flights)
  • Fri73%(59 flights)
  • Sat86%(43 flights)
  • Sun64%(72 flights)
On-time by departure window
  • 3–6 AM91%(23 flights)
  • 6–9 AM93%(73 flights)
  • 9 AM–12 PM87%(95 flights)
  • 12–3 PM89%(26 flights)
  • 3–6 PM61%(69 flights)
  • 6–9 PM60%(109 flights)
  • 9 PM–12 AM—(5 flights)
On-time trend by month
88%
May

Jun 62% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%52
July 202547%57
August 202591%33
September 202590%30
October 202556%18
November 202572%18
December 202573%15
January 202693%30
February 202689%28
March 202680%35
April 202686%42
May 202688%42
Departures on time
72%
Diverted
0.5%
Flights flown
400
Months covered
12

Keep nerding

Based on 402 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.