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Flight Reliability

WN 1859 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1859 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
7 min
Average arrival delay
0.3%
Cancelled
2 min early
Median arrival delay

Based on 373 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(59 flights)
  • Tue81%(52 flights)
  • Wed85%(52 flights)
  • Thu80%(59 flights)
  • Fri75%(60 flights)
  • Sat84%(37 flights)
  • Sun58%(52 flights)
On-time by departure window
  • 3–6 AM91%(23 flights)
  • 6–9 AM87%(63 flights)
  • 9 AM–12 PM89%(53 flights)
  • 12–3 PM80%(75 flights)
  • 3–6 PM75%(12 flights)
  • 6–9 PM70%(109 flights)
  • 9 PM–12 AM39%(36 flights)
On-time trend by month
86%
May

Jun 80% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%30
July 202573%30
August 202568%25
September 202589%26
October 202570%27
November 202559%29
December 202561%31
January 202684%31
February 202686%28
March 202665%31
April 202685%39
May 202686%44
Departures on time
72%
Diverted
0.3%
Flights flown
371
Months covered
12

Keep nerding

Based on 373 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.