ICAO		IATA		Other		Location
KECS		ECS		ECS		Newcastle [Mondell Field], Wyoming, US (62 mi / 101 km W)
				1SD4		Faith [Vig Limousin Airport], South Dakota, US (63 mi / 101 km NE)
				SD69		Interior [Badlands Heliport], South Dakota, US (64 mi / 103 km E)
				SD04		Opal [Keystone Xl Opal Heliport], South Dakota, US (67 mi / 108 km N)
				6V0		Edgemont [Muni], South Dakota, US (67 mi / 108 km SW)
				1SD6		Oelrich's [Bogner No II Airport], South Dakota, US (69 mi / 111 km S)
				SD71		Oelrichs [Bogner Field], South Dakota, US (69 mi / 112 km S)
				SD07		Philip [Keystone Xl Philip Heliport], South Dakota, US (71 mi / 114 km E)
				WY44		Mule Creek Junction [Robbers Roost Ranch Airport], Wyoming, US (74 mi / 119 km SW)
KPHP		PHP		PHP		Philip, South Dakota, US (75 mi / 120 km E)
				6SD4		Edgemont [Xpoint Airport], South Dakota, US (76 mi / 123 km SW)
				83V		Upton [Muni], Wyoming, US (77 mi / 124 km W)
				WY55		Sundance [Taylor Field], Wyoming, US (77 mi / 125 km W)
				SD48		Faith [Blomberg 42 Ranch Airport (Private)], South Dakota, US (79 mi / 127 km N)
				0SD7		Wanblee [Porch Ranch Airport], South Dakota, US (79 mi / 127 km SE)
KIEN		XPR		IEN		Pine Ridge, South Dakota, US (80 mi / 129 km S)
				0SD3		Hoover [Bledsoe Ranch Airport], South Dakota, US (81 mi / 130 km N)
				10SD		Wanblee [Wanblee Health Center Heliport], South Dakota, US (81 mi / 130 km SE)
				5V8		Kadoka [Muni], South Dakota, US (82 mi / 132 km E)
				W43		Hulett [Muni], Wyoming, US (82 mi / 133 km NW)