Flight Reliability
NK 1643 · Spirit Airlines
Detroit → Las Vegas (DTW–LAS)81% of its flights flew this route. The rest (SDF–MCO) are included in these numbers.
86
Pretty Reliable
WanderNerd Reliability Score
- 78%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 0%
- Cancelled
- 13 min early
- Median arrival delay
Based on 78 historical flights. Data through May 2026.
What the data says
Saturday is the weak spot.
NK 1643 arrived on time 86% of the time on Sundays. On Saturdays: 79%.
A bit ahead of the Spirit Airlines network.
NK 1643 arrived on time 78% of the time, versus 74% across the Spirit Airlines network.
The breakdown
- Mon—(9 flights)
- Tue—(9 flights)
- Wed—(9 flights)
- Thu79%(14 flights)
- Fri—(9 flights)
- Sat79%(14 flights)
- Sun86%(14 flights)
- 6–9 PM78%(73 flights)
- 9 PM–12 AM—(5 flights)
82%
Mar
Jul 80% → Mar 82% on time
| Month | On-time percentage | Flights |
|---|---|---|
| July 2025 | 80% | 10 |
| January 2026 | 83% | 24 |
| February 2026 | 71% | 28 |
| March 2026 | 82% | 11 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 78
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 78 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.