The southern-most bend in the Magellan Strait is 54 degrees S, and the Drake Passage begins at about 56 degrees S -- about 138 nautical miles.
The distance between the Drake Passage and the northern-most tip of Antarctica is about 500 miles wide.
The answer you want, then, is about 638 miles with a mix of nautical and statute miles.
50 degrees
There are many bodies of water across the world. The South Pacific Ocean and the Southern Ocean meet near Cape Horn at the Strait of Magellan.
5,400,000 miles
Ferdinand Magellan traveled approximately 42,000 miles during his expedition.
42,000 thousand miles
3555 miles
5,400,000 square miles.
8892 miles
Antarctica - About 5.4 million square miles.
On average, there are about 7520 miles, depending on where in Antarctica you start from, and which island in Hawaii you go to.
Antarctica's area is 5.405 million sq miles (14 million km²).
As the crow flies, 8361.761 miles.