NK251
NK251 (Spirit Airlines) is a multi-stop service on 4 routes, busiest Indianapolis to Newark. Of 216 departures recorded from January 2025 to May 2026, 88.8% left on time, according to the US BTS.
- On-time departures88.8%of 216 flights
- Average delay1.6 min
- May 20261▼ 75.0%vs May 2025
- Cancelled5.1%
- Legs flown under this number4
Recorded departures by month
Short series — NK251 has only 10 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 periods10 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 23 | 24 | ▲ 4.3% |
| February | 28 | 16 | ▼ 42.9% |
| March | 30 | 31 | ▲ 3.3% |
| April | 30 | 29 | ▼ 3.3% |
| May | 4 | 1 | ▼ 75.0% |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–May) | 115 | 101 | ▼ 12.2% |
according to the US BTS · January 2025 → May 2026
On-time departures by month
Short series — NK251 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 | 91.3% | 77.3% | ▼ 15.4% |
| February | 92.9% | 93.3% | ▲ 0.5% |
| March | 83.3% | 96.0% | ▲ 15.2% |
| April | 96.7% | 85.7% | ▼ 11.3% |
| May | 50.0% | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year-to-date average (Jan–Apr) | 91.0% | 88.1% | ▼ 3.3% |
according to the US BTS · January 2025 → April 2026
Average departure delay by month
Short series — NK251 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 — NK251 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods10 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 1 | – |
| March | 0 | 6 | – |
| April | 0 | 1 | – |
| May | 0 | 1 | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
| Year to date (Jan–May) | 0 | 11 |
according to the US BTS · January 2025 → May 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 94.9% 205
- Cancelled 5.1% 11
Share of all recorded flights in the period, all legs. · Jan 9, 2025 → May 1, 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 |
|---|---|---|---|---|
| IND EWR Indianapolis International Airport – Newark Liberty International Airport | 1,035 | -0.5 min | 90.5% | 84 |
| SEA LAS Seattle–Tacoma International Airport – Harry Reid International Airport | 1,395 | 0.9 min | 91.7% | 60 |
| DTW LAS Detroit Metropolitan Wayne County Airport – Harry Reid International Airport | 2,808 | 3.7 min | 87.3% | 55 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| January 2025 | 23 | 23 | 91.3% | 0 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 30 | 30 | 83.3% | 0 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 4 | 4 | 50.0% | 0 |
| January 2026 | 24 | 22 | 77.3% | 2 |
| February 2026 | 16 | 15 | 93.3% | 1 |
| March 2026 | 31 | 25 | 96.0% | 6 |
| April 2026 | 29 | 28 | 85.7% | 1 |
| May 2026 | 1 | 0 | — | 1 |