There are
2,725 mi
from Sunnyvale, CA to Hilton Head Island, SC
That's the driving distance. It would take 2 days to go from Sunnyvale, California to Hilton Head Island, South Carolina.
The flight distance (direct flight from Sunnyvale, CA to Hilton Head Island, SC) is 2,350.57 mi.
2,725 mi = 3.22 kms