| Identifier: | ONSET |
| NAS ID: | ONSET |
| Name: | ONSET |
| Fix Type: | Civilian |
| Fix Use: | |
| State: | WASHINGTON |
| ICAO Region: | K1 |
| Latitude: | 48-57-28.820N (48.958000) |
| Longitude: | 118-00-00.030W (-118.000000) |
| Magnetic Variance: | 14.3 E as of 9/30/2025 |
| High ARTCC Area: | ZSE |
| Low ARTCC Area: | ZSE |
| Published: | Yes |
| Charts: | |
| Pitch: | No |
| Catch: | No |
| SUA ATCAA: | No |
| CONTROLLER HIGH |
| ENROUTE HIGH |
| STAR |