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Flight Reliability

WN 528 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 528 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

71%
Arrive within 15 minutes
12 min
Average arrival delay
1.7%
Cancelled
1 min early
Median arrival delay

Based on 348 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(51 flights)
  • Tue69%(52 flights)
  • Wed67%(52 flights)
  • Thu69%(52 flights)
  • Fri71%(51 flights)
  • Sat94%(32 flights)
  • Sun57%(51 flights)
On-time by departure window
  • 6–9 AM—(9 flights)
  • 9 AM–12 PM64%(47 flights)
  • 12–3 PM—(6 flights)
  • 3–6 PM71%(198 flights)
  • 6–9 PM72%(81 flights)
On-time trend by month
55%
Mar

Jun 69% → Mar 55% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%29
July 202567%30
August 202564%52
September 202587%55
October 202544%27
November 202582%27
December 202548%29
January 202693%29
February 202689%28
March 202655%29
Departures on time
66%
Diverted
0.3%
Flights flown
341
Months covered
12

Keep nerding

Based on 348 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.