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Flight Reliability

NK 1603 · Spirit Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and NK 1603 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

59%
Arrive within 15 minutes
35 min
Average arrival delay
6.0%
Cancelled
1 min
Median arrival delay

Based on 182 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon42%(26 flights)
  • Tue70%(23 flights)
  • Wed76%(25 flights)
  • Thu54%(24 flights)
  • Fri50%(24 flights)
  • Sat75%(24 flights)
  • Sun44%(25 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM89%(55 flights)
  • 6–9 PM42%(90 flights)
  • 9 PM–12 AM52%(25 flights)
On-time trend by month
42%
Apr

Sep 85% → Apr 42% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
September 202585%27
October 202593%27
November 202541%29
January 202659%22
February 202637%27
March 202646%24
April 202642%12
Departures on time
61%
Diverted
0%
Flights flown
171
Months covered
8

Keep nerding

Based on 182 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.