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Flight Reliability

NK 1633 · Spirit Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and NK 1633 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

90%
Arrive within 15 minutes
7 min early
Average arrival delay
5.0%
Cancelled
13 min early
Median arrival delay

Based on 121 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(17 flights)
  • Tue100%(13 flights)
  • Wed94%(18 flights)
  • Thu100%(17 flights)
  • Fri79%(19 flights)
  • Sat92%(13 flights)
  • Sun81%(16 flights)
On-time by departure window
  • 6–9 AM95%(65 flights)
  • 9 AM–12 PM80%(20 flights)
  • 6–9 PM86%(28 flights)
On-time trend by month
100%
Apr

Jul 82% → Apr 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
July 202582%17
January 202691%23
February 2026100%27
March 202683%29
April 2026100%10
Departures on time
92%
Diverted
1.7%
Flights flown
113
Months covered
6

Keep nerding

Based on 121 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.