ICAO		IATA		Other		Location
				MT29		Miles City [Sunday Creek Airpark], Montana, US (140 mi / 225 km N)
				WY53		Four Corners [Moburg Aero Airport], Wyoming, US (143 mi / 231 km E)
				WY66		Douglas [Chamberlain Brothers Ranch Airport], Wyoming, US (144 mi / 231 km SE)
				MT45		Ekalaka [Castleberry Airport], Montana, US (146 mi / 235 km NE)
				97M		Ekalaka, Montana, US (146 mi / 235 km NE)
KDGW		DGW		DGW		Douglas [Converse County Airport], Wyoming, US (147 mi / 236 km SE)
KRPX		RPX		RPX		Roundup, Montana, US (151 mi / 243 km NW)
KEFC				EFC		Belle Fourche [Muni], South Dakota, US (152 mi / 244 km E)
KLND		LND		LND		Lander [Hunt Field], Wyoming, US (153 mi / 246 km SW)
				80S		Lavina, Montana, US (153 mi / 247 km NW)
				SD91		Spearfish [Star Aviation Number 1 Heliport], South Dakota, US (154 mi / 248 km E)
KDUB				DUB		Dubois [Muni], Wyoming, US (155 mi / 250 km SW)
KSPF		SPF		SPF		Spearfish [Black Hills-Clyde Ice Field], South Dakota, US (156 mi / 250 km E)
				SD90		Spearfish [Mitchells Strip], South Dakota, US (156 mi / 250 km E)
				WY27		Douglas [Wagonhound Airport], Wyoming, US (156 mi / 251 km SE)
				SD33		Camp Crook [Sky Ranch For Boys Airport], South Dakota, US (156 mi / 251 km NE)
				WY44		Mule Creek Junction [Robbers Roost Ranch Airport], Wyoming, US (157 mi / 252 km SE)
				3SD5		Lead [Dilligaf Heliport], South Dakota, US (158 mi / 254 km E)
				3MT3		Ryegate [Three Cross Ranch Airport], Montana, US (158 mi / 255 km NW)
				8OA5		Camp Crook [Muni], South Dakota, US (159 mi / 256 km NE)