NK631
NK631 (Spirit Airlines) is a multi-stop service on 3 routes, busiest Seattle to Los Angeles. Of 77 departures recorded from February 2025 to November 2025, 69.3% left on time, according to the US BTS.
- On-time departures69.3%of 77 flights
- Average delay25.0 min
- November 202510
- Cancelled2.6%
- Legs flown under this number3
Recorded departures by month
Short series — NK631 has only 5 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 periods5 periods
| Period | Departures 2024 | Departures 2025 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | 17 | – |
| March | – | 26 | – |
| April | – | 20 | – |
| May | – | 4 | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | – |
| November | – | 10 | – |
| December | – | – | – |
according to the US BTS · February 2025 → November 2025
On-time departures by month
Short series — NK631 has only 5 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 periods5 periods
| Period | On time 2024 | On time 2025 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | 47.1% | – |
| March | – | 88.5% | – |
| April | – | 68.4% | – |
| May | – | 100.0% | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | – |
| November | – | 44.4% | – |
| December | – | – | – |
according to the US BTS · February 2025 → November 2025
Average departure delay by month
Short series — NK631 has only 5 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 · February 2025 → November 2025
Cancelled departures by month
Short series — NK631 has only 5 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods5 periods
| Period | Cancelled 2024 | Cancelled 2025 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | – | 1 | – |
| May | – | 0 | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | – |
| November | – | 1 | – |
| December | – | – | – |
according to the US BTS · February 2025 → November 2025
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 97.4% 75
- Cancelled 2.6% 2
Share of all recorded flights in the period, all legs. · Feb 12, 2025 → Nov 17, 2025
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA LAX Seattle–Tacoma International Airport – Los Angeles International Airport | 1,537 | 15.0 min | 82.2% | 46 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| February 2025 | 17 | 17 | 47.1% | 0 |
| March 2025 | 26 | 26 | 88.5% | 0 |
| April 2025 | 20 | 19 | 68.4% | 1 |
| May 2025 | 4 | 4 | 100.0% | 0 |
| November 2025 | 10 | 9 | 44.4% | 1 |