ICAO		IATA		Other		Location
KEFC				EFC		Belle Fourche [Muni], South Dakota, US (22 mi / 35 km SW)
				0SD3		Hoover [Bledsoe Ranch Airport], South Dakota, US (28 mi / 45 km NE)
				SD35		Sturgis [Bruch Airfield], South Dakota, US (29 mi / 47 km S)
				SD24		Sturgis [Eden Valley Airport], South Dakota, US (32 mi / 52 km S)
KSPF		SPF		SPF		Spearfish [Black Hills-Clyde Ice Field], South Dakota, US (33 mi / 53 km SW)
				SD90		Spearfish [Mitchells Strip], South Dakota, US (34 mi / 55 km SW)
				SD26		Sturgis [Mike Jacob Sturgis Heliport], South Dakota, US (34 mi / 55 km S)
				SD91		Spearfish [Star Aviation Number 1 Heliport], South Dakota, US (34 mi / 55 km SW)
				49B		Sturgis [Muni], South Dakota, US (34 mi / 55 km S)
				2SD5		Sturgis [Sturgis Heliport], South Dakota, US (35 mi / 56 km S)
				SD04		Opal [Keystone Xl Opal Heliport], South Dakota, US (41 mi / 67 km E)
				SD72		Opal [Vig Ranch Airfield], South Dakota, US (45 mi / 72 km E)
				SD48		Faith [Blomberg 42 Ranch Airport (Private)], South Dakota, US (46 mi / 74 km NE)
				9D2		Buffalo [Harding County Airport], South Dakota, US (46 mi / 74 km N)
				SD33		Camp Crook [Sky Ranch For Boys Airport], South Dakota, US (48 mi / 77 km NW)
				SD25		Piedmont [Infinity Landing Airport], South Dakota, US (49 mi / 79 km S)
				3SD5		Lead [Dilligaf Heliport], South Dakota, US (49 mi / 79 km S)
				8OA5		Camp Crook [Muni], South Dakota, US (51 mi / 83 km NW)
				2SD0		Nemo [Paradise Valley Airport], South Dakota, US (52 mi / 83 km S)
				1SD4		Faith [Vig Limousin Airport], South Dakota, US (53 mi / 85 km E)