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Flight Reliability

WN 3159 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3159 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

79%
Arrive within 15 minutes
3 min
Average arrival delay
0%
Cancelled
5 min early
Median arrival delay

Based on 391 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(58 flights)
  • Tue84%(62 flights)
  • Wed72%(61 flights)
  • Thu73%(55 flights)
  • Fri76%(54 flights)
  • Sat78%(49 flights)
  • Sun90%(51 flights)
On-time by departure window
  • 6–9 AM96%(118 flights)
  • 9 AM–12 PM89%(82 flights)
  • 12–3 PM67%(66 flights)
  • 3–6 PM66%(61 flights)
  • 6–9 PM57%(61 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
52%
May

Jun 45% → May 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202545%20
July 202571%17
August 202578%40
September 202564%39
October 202597%32
November 202590%30
December 202597%30
January 202689%53
February 202691%35
March 202685%33
April 202667%30
May 202652%31
Departures on time
76%
Diverted
0.3%
Flights flown
390
Months covered
12

Keep nerding

Based on 391 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.