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Flight Reliability

WN 559 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 559 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

65%
Arrive within 15 minutes
19 min
Average arrival delay
1.6%
Cancelled
2 min
Median arrival delay

Based on 304 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon59%(44 flights)
  • Tue71%(42 flights)
  • Wed73%(41 flights)
  • Thu58%(45 flights)
  • Fri67%(42 flights)
  • Sat67%(43 flights)
  • Sun61%(41 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM96%(24 flights)
  • 9 AM–12 PM100%(20 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM69%(70 flights)
  • 6–9 PM58%(113 flights)
  • 9 PM–12 AM46%(61 flights)
On-time trend by month
42%
May

Jun 38% → May 42% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202538%16
July 202539%18
August 202571%28
September 202564%25
October 202571%42
November 202578%27
December 202579%29
February 202688%16
March 202661%28
April 202669%29
May 202642%31
Departures on time
61%
Diverted
0.3%
Flights flown
298
Months covered
12

Keep nerding

Based on 304 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.