Skip to content
WanderNerd
Check a flight

Airline Reliability

Spirit Airlines

Carrier code NK · 152,066 flights in the data

67
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
12 min
Average arrival delay
3.4%
Cancelled
5 min early
Median arrival delay

Data through May 2026.

What the data says

Morning flights do better here.

Spirit Airlines flights departing between 3–6 AM arrived on time 88% of the time, versus 64% between 6–9 PM.

Sunday scaries are real for this one.

Spirit Airlines flights arrived on time 81% of the time on Wednesdays. On Sundays: 68%.

Keep a backup plan handy.

Spirit Airlines was cancelled 3.4% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon71%(23170 flights)
  • Tue79%(17101 flights)
  • Wed81%(17088 flights)
  • Thu75%(23459 flights)
  • Fri73%(23184 flights)
  • Sat74%(19389 flights)
  • Sun68%(23161 flights)
On-time by departure window
  • 12–3 AM74%(1240 flights)
  • 3–6 AM88%(7948 flights)
  • 6–9 AM86%(29556 flights)
  • 9 AM–12 PM80%(22796 flights)
  • 12–3 PM73%(20489 flights)
  • 3–6 PM66%(23059 flights)
  • 6–9 PM64%(27669 flights)
  • 9 PM–12 AM67%(13795 flights)
On-time trend by month
69%
May

Jun 76% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%17329
July 202576%16924
August 202578%16999
September 202585%14884
October 202581%13958
November 202579%11513
December 202567%11344
January 202673%11047
February 202669%10579
March 202655%11575
April 202666%10096
May 202669%304

Busiest Spirit Airlines routes

Biggest airports

Based on 152,066 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.