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Flight Reliability

WN 3944 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3944 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

81%
Arrive within 15 minutes
1 min early
Average arrival delay
1.3%
Cancelled
6 min early
Median arrival delay

Based on 226 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(35 flights)
  • Tue89%(26 flights)
  • Wed80%(25 flights)
  • Thu70%(33 flights)
  • Fri86%(36 flights)
  • Sat100%(21 flights)
  • Sun76%(46 flights)
On-time by departure window
  • 6–9 AM100%(32 flights)
  • 9 AM–12 PM—(8 flights)
  • 12–3 PM70%(46 flights)
  • 3–6 PM63%(54 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM90%(81 flights)
On-time trend by month
71%
May

Aug 94% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202594%16
September 2025100%17
November 202596%28
December 2025100%31
January 202679%28
February 202650%32
April 202675%24
May 202671%31
Departures on time
79%
Diverted
0.4%
Flights flown
222
Months covered
11

Keep nerding

Based on 226 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.