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Flight Reliability

WN 3109 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3109 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
5 min
Average arrival delay
1.1%
Cancelled
6 min early
Median arrival delay

Based on 358 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(52 flights)
  • Tue77%(51 flights)
  • Wed77%(51 flights)
  • Thu79%(48 flights)
  • Fri85%(47 flights)
  • Sat82%(56 flights)
  • Sun67%(49 flights)
On-time by departure window
  • 3–6 AM100%(10 flights)
  • 6–9 AM87%(121 flights)
  • 9 AM–12 PM95%(63 flights)
  • 12–3 PM73%(26 flights)
  • 3–6 PM—(2 flights)
  • 6–9 PM64%(124 flights)
  • 9 PM–12 AM—(8 flights)
On-time trend by month
34%
May

Jun 86% → May 34% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 202597%31
August 202598%42
September 202591%43
October 2025100%17
November 202570%20
December 202581%31
January 202693%29
February 202672%18
March 202666%29
April 202652%33
May 202634%32
Departures on time
75%
Diverted
0%
Flights flown
354
Months covered
12

Keep nerding

Based on 358 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.