Flight Reliability
NK 573 · Spirit Airlines
Fort Lauderdale → Philadelphia (FLL–PHL)92% of its flights flew this route. The rest (SJU–IAH) are included in these numbers.
- 44%
- Arrive within 15 minutes
- 47 min
- Average arrival delay
- 11.3%
- Cancelled
- 21 min
- Median arrival delay
Based on 106 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
NK 573 arrived on time 75% of the time on Tuesdays and just 23% on Thursdays. That gap is worth planning around.
Well behind the FLL–PHL route.
NK 573 arrived on time 44% of the time, versus 73% across the FLL–PHL route.
Well behind the Spirit Airlines network.
NK 573 arrived on time 44% of the time, versus 74% across the Spirit Airlines network.
Keep a backup plan handy.
NK 573 was cancelled 11.3% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon46%(13 flights)
- Tue75%(12 flights)
- Wed62%(13 flights)
- Thu23%(13 flights)
- Fri38%(16 flights)
- Sat29%(14 flights)
- Sun39%(13 flights)
- 6–9 PM—(9 flights)
- 9 PM–12 AM42%(85 flights)
Jan 67% → Apr 33% on time
| Month | On-time percentage | Flights |
|---|---|---|
| January 2026 | 67% | 21 |
| February 2026 | 48% | 25 |
| March 2026 | 22% | 27 |
| April 2026 | 33% | 12 |
- Departures on time
- 37%
- Diverted
- 0%
- Flights flown
- 94
- Months covered
- 6
Same route, other flights
Keep nerding
Based on 106 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.