Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 3960 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3960 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

76%
Arrive within 15 minutes
9 min
Average arrival delay
0.5%
Cancelled
3 min early
Median arrival delay

Based on 207 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(30 flights)
  • Tue83%(30 flights)
  • Wed76%(33 flights)
  • Thu78%(32 flights)
  • Fri85%(26 flights)
  • Sat70%(27 flights)
  • Sun67%(27 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM69%(29 flights)
  • 9 AM–12 PM90%(77 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM84%(25 flights)
  • 9 PM–12 AM62%(55 flights)
On-time trend by month
100%
May

Jun 62% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%29
July 202557%30
October 202576%25
November 202575%12
December 202594%16
March 202658%26
April 202693%30
May 2026100%31
Departures on time
76%
Diverted
0.5%
Flights flown
205
Months covered
10

Keep nerding

Based on 207 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.