NK581
NK581 (Spirit Airlines) is a multi-stop service on 3 routes, busiest Fort Lauderdale to Chicago. Of 196 departures recorded from January 2025 to April 2026, 60.1% left on time, according to the US BTS.
- On-time departures60.1%of 196 flights
- Average delay24.8 min
- April 202614▼ 51.7%vs April 2025
- Cancelled6.6%
- Legs flown under this number3
Recorded departures by month
Short series — NK581 has only 9 months so far. Enough to show the level now, not enough to read a trend.
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods9 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 14 | 24 | ▲ 71.4% |
| February | 22 | 28 | ▲ 27.3% |
| March | 29 | 30 | ▲ 3.4% |
| April | 29 | 14 | ▼ 51.7% |
| May | 6 | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–Apr) | 94 | 96 | ▲ 2.1% |
according to the US BTS · January 2025 → April 2026
On-time departures by month
Short series — NK581 has only 9 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods9 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 81.8% | 54.6% | ▼ 33.3% |
| February | 81.8% | 59.3% | ▼ 27.6% |
| March | 64.3% | 42.3% | ▼ 34.2% |
| April | 62.1% | 50.0% | ▼ 19.4% |
| May | 33.3% | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year-to-date average (Jan–Apr) | 72.5% | 51.5% | ▼ 28.9% |
according to the US BTS · January 2025 → April 2026
Average departure delay by month
Short series — NK581 has only 9 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
according to the US BTS · January 2025 → April 2026
Cancelled departures by month
Short series — NK581 has only 9 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods9 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 2 | ▼ 33.3% |
| February | 0 | 1 | – |
| March | 1 | 4 | ▲ 300.0% |
| April | 0 | 2 | – |
| May | 0 | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–Apr) | 4 | 9 | ▲ 125.0% |
according to the US BTS · January 2025 → April 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 93.4% 183
- Cancelled 6.6% 13
Share of all recorded flights in the period, all legs. · Jan 9, 2025 → Apr 14, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| FLL ORD Fort Lauderdale Hollywood International Airport – Chicago O'Hare International Airport | 1,905 | 30.6 min | 51.7% | 96 |
| PHL MCO Philadelphia International Airport – Orlando International Airport | 1,389 | 24.6 min | 61.0% | 60 |
| PHL ATL Philadelphia International Airport – Hartsfield Jackson Atlanta International Airport | 1,072 | 11.4 min | 78.4% | 40 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| January 2025 | 14 | 11 | 81.8% | 3 |
| February 2025 | 22 | 22 | 81.8% | 0 |
| March 2025 | 29 | 28 | 64.3% | 1 |
| April 2025 | 29 | 29 | 62.1% | 0 |
| May 2025 | 6 | 6 | 33.3% | 0 |
| January 2026 | 24 | 22 | 54.6% | 2 |
| February 2026 | 28 | 27 | 59.3% | 1 |
| March 2026 | 30 | 26 | 42.3% | 4 |
| April 2026 | 14 | 12 | 50.0% | 2 |