NK1637
NK1637 (Spirit Airlines) is a multi-stop service on 4 routes, busiest Los Angeles to Las Vegas. Of 167 departures recorded from January 2025 to April 2026, 86.0% left on time, according to the US BTS.
- On-time departures86.0%of 167 flights
- Average delay7.1 min
- April 202613
- Cancelled1.8%
- Legs flown under this number4
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods12 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 17 | 24 | ▲ 41.2% |
| February | 25 | 28 | ▲ 12.0% |
| March | 3 | 31 | ▲ 933.3% |
| April | – | 13 | – |
| May | – | – | – |
| June | – | – | – |
| July | 3 | – | – |
| August | 2 | – | – |
| September | 8 | – | – |
| October | 12 | – | in progress |
| November | 1 | – | – |
| December | – | – | – |
according to the US BTS · January 2025 → April 2026
On-time departures by month
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 periods12 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 76.5% | 100.0% | ▲ 30.8% |
| February | 70.8% | 84.6% | ▲ 19.5% |
| March | 66.7% | 87.1% | ▲ 30.6% |
| April | – | 100.0% | – |
| May | – | – | – |
| June | – | – | – |
| July | 66.7% | – | – |
| August | 100.0% | – | – |
| September | 100.0% | – | – |
| October | 83.3% | – | in progress |
| November | 100.0% | – | – |
| December | – | – | – |
according to the US BTS · January 2025 → April 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · January 2025 → April 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods12 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 1 | 2 | ▲ 100.0% |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | – | – | – |
| June | – | – | – |
| July | 0 | – | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | – | – | – |
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 98.2% 164
- Cancelled 1.8% 3
Share of all recorded flights in the period, all legs. · Jan 9, 2025 → Apr 13, 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 |
|---|---|---|---|---|
| LAX LAS Los Angeles International Airport – Harry Reid International Airport | 380 | 7.0 min | 91.5% | 96 |
| SJU MIA Luis Munoz Marin International Airport – Miami International Airport | 1,682 | 12.0 min | 72.7% | 45 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| January 2025 | 17 | 17 | 76.5% | 0 |
| February 2025 | 25 | 24 | 70.8% | 1 |
| March 2025 | 3 | 3 | 66.7% | 0 |
| July 2025 | 3 | 3 | 66.7% | 0 |
| August 2025 | 2 | 2 | 100.0% | 0 |
| September 2025 | 8 | 8 | 100.0% | 0 |
| October 2025 | 12 | 12 | 83.3% | 0 |
| November 2025 | 1 | 1 | 100.0% | 0 |
| January 2026 | 24 | 24 | 100.0% | 0 |
| February 2026 | 28 | 26 | 84.6% | 2 |
| March 2026 | 31 | 31 | 87.1% | 0 |
| April 2026 | 13 | 13 | 100.0% | 0 |