There are
1,057 mi
from Round Rock, TX to Fernandina Beach, FL
That's the driving distance. It would take 19 hours 42 mins to go from Round Rock, Texas to Fernandina Beach, Florida.
The flight distance (direct flight from Round Rock, TX to Fernandina Beach, FL) is 963.74 mi.
1,057 mi = 1.61 kms