California and Antarctica are both quite big places.
The gaps between the closest bit of California to the closest bit of Antarctica is about 7350 miles (11,835 km). The gap from the farthest bit of California to the farthest bit of Antarctica is (roughly) 9838 miles / 15,831 km.
The middle average sort of distance, between centre of Antarctica and centre California is about 8960 miles / 14,400 km.
The gaps between the closest bit of California to the closest bit of Antarctica is about 7350 miles (11,835 km). The gap from the farthest bit of California to the farthest bit of Antarctica is (roughly) 9838 miles / 15,831 km.
The middle average sort of distance, between centre of Antarctica and centre California is about 8960 miles / 14,400 km.