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Flight Reliability

WN 3983 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3983 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

66%
Arrive within 15 minutes
16 min
Average arrival delay
0.6%
Cancelled
2 min
Median arrival delay

Based on 328 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon63%(56 flights)
  • Tue80%(44 flights)
  • Wed70%(43 flights)
  • Thu60%(53 flights)
  • Fri57%(53 flights)
  • Sat86%(35 flights)
  • Sun56%(41 flights)
On-time by departure window
  • 6–9 AM96%(23 flights)
  • 9 AM–12 PM92%(24 flights)
  • 12–3 PM67%(63 flights)
  • 3–6 PM58%(81 flights)
  • 6–9 PM61%(134 flights)
On-time trend by month
55%
May

Jun 58% → May 55% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%43
July 202555%42
October 202592%26
November 202589%27
December 202572%29
January 202665%31
February 202677%35
March 202662%26
April 202652%29
May 202655%31
Departures on time
58%
Diverted
0.3%
Flights flown
325
Months covered
11

Keep nerding

Based on 328 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.