| Navaid Facility ID: | ISN |
| Official Navaid Facility ID: | ISN |
| Navaid Facility Type: | NDB |
| Navaid Name: | Williston |
| City: | WILLISTON |
| State: | NORTH DAKOTA |
| FAA Region: | |
| Latitude: | 48-08-45.086N (48.1459) |
| Longitude: | 103-35-01.702W (-103.5838) |
| Lat/Long Survey Accuracy: | 1 second or better |
| Owner: | ARINC |
| Operator: | FRONTIER AIRLINES |
| Common System Usage: | No |
| Public Use: | No |
| Navaid Class: | HW |
| Hours of Operation: | 24 |
| Magnetic Variance: | 7.5 E as of 9/30/2025 |
| ARTCC High Altitude ID (Name): | ZLC (SALT LAKE CITY) |
| ARTCC Low Altitude ID (Name): | ZLC (SALT LAKE CITY) |
| Navaid ID | Navaid Facility Type | Remarks |
|---|---|---|
| ISN | NDB | DO NOT CHART |
| Navaid ID | Navaid Facility Type | Magnetic Variance | Airspace Fixes |
|---|---|---|---|
| ISN | VOR-DME | 7.6 E | ALOPE MT - K1 BETKE MT - K1 CIDIN ND - K3 DORIA MT - K1 DUCBA MT - K1 ERUVE ND - K3 EXADE MT - K1 FOGBA ND - K3 FONIA ND - K3 FORBI ND - K3 GERHE ND - K3 GINBE ND - K3 HASIP ND - K3 HOXUX ND - K3 HUTVI ND - K3 JADPA ND - K3 JUROX ND - K3 LAMBE MT - K1 OFBUF ND - K3 OFEGY MT - K1 OFETI ND - K3 |
| ISN | VOR-DME | 7.6 E | POVNY ND - K3 RILMY MT - K1 SAKIE ND - K3 UNCUP ND - K3 VUYUC ND - K3 WAULS ND - K3 WILAN ND - K3 YAFLU MT - K1 ZOPIV ND - K3 |
| Navaid ID | Navaid Facility Type | Holding Patterns |
|---|---|---|
| ISN | VOR-DME | JADPA INT*ND*K3, Pattern #: 1 JUROX INT*ND*K3, Pattern #: 1 WILLISTON VOR/DME*ND, Pattern #: 1 WILLISTON VOR/DME*ND, Pattern #: 2 |