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Flight Reliability

WN 1109 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1109 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
0.6%
Cancelled
4 min early
Median arrival delay

Based on 324 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(41 flights)
  • Tue87%(55 flights)
  • Wed84%(56 flights)
  • Thu73%(41 flights)
  • Fri69%(39 flights)
  • Sat81%(31 flights)
  • Sun75%(59 flights)
On-time by departure window
  • 6–9 AM87%(83 flights)
  • 9 AM–12 PM75%(56 flights)
  • 12–3 PM89%(56 flights)
  • 3–6 PM71%(83 flights)
  • 6–9 PM67%(43 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
64%
May

Jun 100% → May 64% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%16
July 202594%18
August 2025100%14
September 202592%13
October 202570%27
November 202585%41
December 202577%53
January 202674%34
February 202682%28
March 202652%27
April 202681%26
May 202664%25
Departures on time
73%
Diverted
0%
Flights flown
322
Months covered
12

Keep nerding

Based on 324 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.