Cape Flying Fish () is an ice-covered cape which forms the west extremity of Thurston Island. It was discovered by Rear Admiral Byrd and members of the US Antarctic Service (USAS) in a flight from the Bear in February 1940. Named by US-SCAN for the United States Exploring Expedition ship Flying Fish, commanded by Lt. William M. Walker, USN, which reached a point within 125 miles of this cape; the ship's position on the morning of March 23, 1839 was 70°00' S, 100°16' W.