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Flight Reliability

NK 1635 · Spirit Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and NK 1635 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

80%
Arrive within 15 minutes
7 min
Average arrival delay
2.3%
Cancelled
12 min early
Median arrival delay

Based on 130 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(19 flights)
  • Tue82%(17 flights)
  • Wed89%(18 flights)
  • Thu72%(18 flights)
  • Fri68%(19 flights)
  • Sat90%(19 flights)
  • Sun77%(17 flights)
On-time by departure window
  • 9 AM–12 PM91%(89 flights)
  • 12–3 PM—(9 flights)
  • 6–9 PM41%(29 flights)
On-time trend by month
92%
Apr

Jul 44% → Apr 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
July 202544%23
August 202560%10
January 2026100%23
February 202686%28
March 202687%30
April 202692%13
Departures on time
82%
Diverted
0%
Flights flown
127
Months covered
6

Keep nerding

Based on 130 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.