Grab the express bus service provided by the county. It ll take you from Florida City (south of Miami) to Duck....dirt cheap. http://www.monroecounty-fl.gov/Pages/Mon��
Miami, FL 1. Head south on N Miami Ave toward W Flagler St 0.1 mi 2. Turn right to merge onto I-95 N 1.2 mi 3. Take exit 3A on the left to merge onto FL-836 W toward Airport/U M / Jackson/VA Hospitals 7.6 mi 4. Take the exit on the left onto FL-826 S toward Coral Way 3.8 mi 5. Continue onto FL-874 S (signs for FL-874 S/Toll Rd/Homestead) Partial toll road 7.3 mi 6. Merge onto Florida 821 Toll S/Homestead Extension of Florida s Turnpike 17.0 mi 7. Exit onto NE 1st Ave/FL-5 S/US-1 S toward Key W Continue to follow FL-5 S/US-1 S 67.0 mi 8. Turn left at Duck Key Dr 0.3 mi 9. Continue onto Bimini Dr 0.3 mi 10. Turn left at Indies Dr N 0.1 mi 11. Take the 1st right onto San Juan St 390 ft Duck Key, FL