ICAO		IATA		Other		Location
				SD91		Spearfish [Star Aviation Number 1 Heliport], South Dakota, US (141 mi / 226 km E)
KLSK		LSK		LSK		Lusk [Muni], Wyoming, US (142 mi / 228 km SE)
				SD90		Spearfish [Mitchells Strip], South Dakota, US (142 mi / 228 km E)
KSPF		SPF		SPF		Spearfish [Black Hills-Clyde Ice Field], South Dakota, US (142 mi / 228 km E)
KEFC				EFC		Belle Fourche [Muni], South Dakota, US (143 mi / 230 km E)
				6S1		Bridger [Muni], Montana, US (144 mi / 231 km NW)
				MT05		Ekalaka [Laird Ranch Airport], Montana, US (145 mi / 233 km NE)
				WY25		Wheatland [Snell - North Laramie River Airport], Wyoming, US (146 mi / 235 km SE)
				6V0		Edgemont [Muni], South Dakota, US (147 mi / 236 km E)
				6SD4		Edgemont [Xpoint Airport], South Dakota, US (147 mi / 237 km SE)
				0SD9		Custer [Crazy Horse Heliport], South Dakota, US (148 mi / 238 km E)
				0SD5		Custer [The Fort Heliport], South Dakota, US (148 mi / 238 km E)
				MT13		Billings [Ostlunds Airport], Montana, US (149 mi / 239 km NW)
KCUT				CUT		Custer [Custer County Airport], South Dakota, US (150 mi / 241 km E)
				SD86		Custer [Monument Health Custer Hospital Heliport], South Dakota, US (150 mi / 242 km E)
				80V		Medicine Bow, Wyoming, US (151 mi / 243 km S)
				63MT		Billings [Billings Flying Service Airport], Montana, US (151 mi / 243 km NW)
				PPNM		Pompeys Pillar National Monument [Pompeys Pillar NM], Montana, US (151 mi / 244 km NW)
				MT55		Billings [Billings Clinic Heliport], Montana, US (153 mi / 246 km NW)
				MT99		Red Lodge [CCMH Heliport], Montana, US (153 mi / 246 km NW)