Flight Reliability
NK 578 · Spirit Airlines
Detroit → Fort Lauderdale (DTW–FLL)
36
Bring Snacks
WanderNerd Reliability Score
- 53%
- Arrive within 15 minutes
- 32 min
- Average arrival delay
- 3.5%
- Cancelled
- 11 min
- Median arrival delay
Based on 86 historical flights. Data through May 2026.
What the data says
Saturday is the weak spot.
NK 578 arrived on time 54% of the time on Thursdays. On Saturdays: 43%.
Well behind the DTW–FLL route.
NK 578 arrived on time 53% of the time, versus 73% across the DTW–FLL route.
Well behind the Spirit Airlines network.
NK 578 arrived on time 53% of the time, versus 74% across the Spirit Airlines network.
The breakdown
- Mon50%(14 flights)
- Tue—(7 flights)
- Wed—(7 flights)
- Thu54%(13 flights)
- Fri43%(14 flights)
- Sat43%(14 flights)
- Sun50%(14 flights)
50%
Apr
Jan 41% → Apr 50% on time
| Month | On-time percentage | Flights |
|---|---|---|
| January 2026 | 41% | 17 |
| February 2026 | 67% | 24 |
| March 2026 | 50% | 28 |
| April 2026 | 50% | 14 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 83
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 86 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.