NK577
NK577 (Spirit Airlines) is a multi-stop service on 2 routes, busiest Fort Lauderdale to Detroit. Of 155 departures recorded from January 2025 to April 2026, 60.7% left on time, according to the US BTS.
- On-time departures60.7%of 155 flights
- Average delay26.1 min
- April 202614▲ 75.0%vs April 2025
- Cancelled3.2%
- Legs flown under this number2
Recorded departures by month
Short series — NK577 has only 8 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 periods8 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 14 | 18 | ▲ 28.6% |
| February | 23 | 24 | ▲ 4.3% |
| March | 23 | 31 | ▲ 34.8% |
| April | 8 | 14 | ▲ 75.0% |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–Apr) | 68 | 87 | ▲ 27.9% |
according to the US BTS · January 2025 → April 2026
On-time departures by month
Short series — NK577 has only 8 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 periods8 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 92.9% | 33.3% | ▼ 64.1% |
| February | 86.4% | 50.0% | ▼ 42.1% |
| March | 86.4% | 40.0% | ▼ 53.7% |
| April | 100.0% | 21.4% | ▼ 78.6% |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year-to-date average (Jan–Apr) | 91.4% | 36.2% | ▼ 60.4% |
according to the US BTS · January 2025 → April 2026
Average departure delay by month
Short series — NK577 has only 8 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 — NK577 has only 8 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods8 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 1 | 2 | ▲ 100.0% |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–Apr) | 2 | 3 | ▲ 50.0% |
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 96.8% 150
- Cancelled 3.2% 5
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| FLL DTW Fort Lauderdale Hollywood International Airport – Detroit Metropolitan Wayne County Airport | 1,819 | 47.1 min | 38.1% | 87 |
| IND TPA Indianapolis International Airport – Tampa International Airport | 1,351 | -0.7 min | 89.4% | 68 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| January 2025 | 14 | 14 | 92.9% | 0 |
| February 2025 | 23 | 22 | 86.4% | 1 |
| March 2025 | 23 | 22 | 86.4% | 1 |
| April 2025 | 8 | 8 | 100.0% | 0 |
| January 2026 | 18 | 18 | 33.3% | 0 |
| February 2026 | 24 | 22 | 50.0% | 2 |
| March 2026 | 31 | 30 | 40.0% | 1 |
| April 2026 | 14 | 14 | 21.4% | 0 |