What is the name of the passage between South America and Antarctica?

The passage between South America and Antarctica is the Drake Passage.

It lies between Cape Horn at the southern tip of Chile and the South Shetland Islands north of the Antarctic Peninsula. The passage connects the Atlantic and Pacific sectors of the Southern Ocean and is about 800 kilometers wide at its narrowest commonly cited crossing.

The Drake Passage is named after the English explorer Sir Francis Drake, although Drake himself probably never sailed through it. Spanish navigator Francisco de Hoces may have reached the passage in 1525, so Spanish sources often call it the Mar de Hoces. The route became especially important because it is open ocean, unlike the narrower Strait of Magellan and Beagle Channel.

Modern oceanographers study the passage because the Antarctic Circumpolar Current funnels through it. This powerful current links the Atlantic, Pacific, and Indian Oceans and helps circulate heat, carbon, and nutrients around Antarctica. Rough seas and waves exceeding 12 meters have also given the passage a reputation as one of the world's most challenging sea crossings.