ICAO		IATA		Other		Location
				1SD6		Oelrich's [Bogner No II Airport], South Dakota, US (55 mi / 89 km S)
				6SD4		Edgemont [Xpoint Airport], South Dakota, US (56 mi / 90 km SW)
				SD98		Enning [Barber Airport], South Dakota, US (58 mi / 94 km NE)
				6V4		Wall [Muni], South Dakota, US (59 mi / 94 km E)
KEFC				EFC		Belle Fourche [Muni], South Dakota, US (62 mi / 100 km N)
				83V		Upton [Muni], Wyoming, US (62 mi / 100 km W)
				WY55		Sundance [Taylor Field], Wyoming, US (69 mi / 111 km NW)
KCDR		CDR		CDR		Chadron [Muni], Nebraska, US (75 mi / 120 km S)
KIEN		XPR		IEN		Pine Ridge, South Dakota, US (76 mi / 122 km SE)
				01WY		Moorcroft [Keyhole Airport], Wyoming, US (76 mi / 122 km NW)
				SD69		Interior [Badlands Heliport], South Dakota, US (76 mi / 123 km E)
				60NE		Chadron [Chadron Community Hospital Heliport], Nebraska, US (77 mi / 124 km S)
				W43		Hulett [Muni], Wyoming, US (78 mi / 125 km NW)
				WY09		Dull Center (SW Clareton) [Sherwin Field Number 1 Airport], Wyoming, US (78 mi / 125 km W)
				SD72		Opal [Vig Ranch Airfield], South Dakota, US (79 mi / 126 km NE)
				DETO		Devils Tower National Monument [Devils Tower NM], Wyoming, US (80 mi / 129 km NW)
				WY14		Hulett [Ipy Ranch Airport], Wyoming, US (81 mi / 131 km NW)
				1SD4		Faith [Vig Limousin Airport], South Dakota, US (84 mi / 135 km NE)
				SD04		Opal [Keystone Xl Opal Heliport], South Dakota, US (86 mi / 139 km NE)
				SD07		Philip [Keystone Xl Philip Heliport], South Dakota, US (88 mi / 141 km E)