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WanderNerd

Flight Reliability

NK 3996 · Spirit Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and NK 3996 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

73%
Arrive within 15 minutes
11 min
Average arrival delay
2.3%
Cancelled
5 min early
Median arrival delay

Based on 171 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(25 flights)
  • Tue70%(23 flights)
  • Wed61%(23 flights)
  • Thu69%(26 flights)
  • Fri72%(25 flights)
  • Sat78%(18 flights)
  • Sun78%(27 flights)
On-time by departure window
  • 6–9 AM95%(37 flights)
  • 3–6 PM75%(16 flights)
  • 6–9 PM59%(82 flights)
  • 9 PM–12 AM81%(32 flights)
On-time trend by month
79%
Nov

Jun 97% → Nov 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%29
July 202577%30
August 202547%30
September 202584%19
October 202557%28
November 202579%28
Departures on time
73%
Diverted
0%
Flights flown
167
Months covered
7

Based on 171 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.