Flight Reliability
NK 1231 · Spirit Airlines
Boston → Fort Lauderdale (BOS–FLL)
50
A Little Dicey
WanderNerd Reliability Score
- 54%
- Arrive within 15 minutes
- 34 min
- Average arrival delay
- 0%
- Cancelled
- 4 min
- Median arrival delay
Based on 35 historical flights. Data through May 2026.
What the data says
Lagging the BOS–FLL route.
NK 1231 arrived on time 54% of the time, versus 67% across the BOS–FLL route.
Well behind the Spirit Airlines network.
NK 1231 arrived on time 54% of the time, versus 74% across the Spirit Airlines network.
The breakdown
- Mon—(5 flights)
- Tue—(5 flights)
- Wed—(5 flights)
- Thu—(5 flights)
- Fri—(5 flights)
- Sat—(5 flights)
- Sun—(5 flights)
- Departures on time
- 43%
- Diverted
- 0%
- Flights flown
- 35
- Months covered
- 2
Same route, other flights
Keep nerding
Based on 35 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.