140 miles taking this route:

1. Take I-95 SOUTH, from Savannah, to I-295 EAST BELTWAY at EXIT 362A, in FLORIDA.
2. Take I-295, around Jacksonville, to SR-105 HECKSCHER RD (to the FERRY) at EXIT 41; turn left off the exit ramp onto SR-105 HECKSCHER RD - EAST (to the FERRY).
3. Follow SR-105 HECKSCHER RD - EAST to the ST. JOHNS RIVER FERRY, and follow signs.
4. Take the ST. JOHNS RIVER FERRY, across the St. Johns River, to MAYPORT. The ferry arrives every half an hour. For more info, see the related link below: