ICAO		IATA		Other		Location
KASY		ASY		ASY		Ashley [Muni], North Dakota, US (157 mi / 253 km NE)
				JECA		Jewel Cave National Monument [Jewel Cave NM], South Dakota, US (158 mi / 254 km W)
				27SD		De Smet [Albrecht Heliport], South Dakota, US (158 mi / 254 km E)
				SD90		Spearfish [Mitchells Strip], South Dakota, US (158 mi / 254 km W)
KSPF		SPF		SPF		Spearfish [Black Hills-Clyde Ice Field], South Dakota, US (158 mi / 254 km W)
				1SD1		Scotland [Burke Field], South Dakota, US (158 mi / 254 km E)
				7L2		Linton [Muni], North Dakota, US (158 mi / 255 km N)
				0NE0		Ashby [Merrihew Airport], Nebraska, US (158 mi / 255 km SW)
				Y03		Springfield [Muni], South Dakota, US (159 mi / 255 km SE)
				4NE1		Milburn [McMillan Ranch Airport], Nebraska, US (159 mi / 256 km S)
				SD59		Crocker [Lone Tree Airport], South Dakota, US (159 mi / 256 km NE)
				SD91		Spearfish [Star Aviation Number 1 Heliport], South Dakota, US (159 mi / 256 km W)
				6E5		Desmet [Wilder Airport], South Dakota, US (159 mi / 256 km E)
				SD49		Ferney [Hite Airport], South Dakota, US (159 mi / 257 km NE)
				8D7		Clark [Clark County Airport], South Dakota, US (161 mi / 259 km NE)
				9NE6		Hyannis [Rothwell Airport], Nebraska, US (163 mi / 262 km S)
				SD77		Menno [Mettler Airport], South Dakota, US (164 mi / 264 km E)
				6V0		Edgemont [Muni], South Dakota, US (164 mi / 265 km W)
				5NE4		Sutherland [Snyder Ranch Airport], Nebraska, US (166 mi / 267 km S)
				41NE		Ewing [Vandersnick Airport], Nebraska, US (166 mi / 267 km SE)