The last time I was in Miami the cost of a taxi from the airport to the port was a flat $21 rate + tip. with 5 people you would obviously need 2 taxis. The cost of Super Shuttle is $10 per person. So, for a family of 5 it looks like the costs would be similar. Nancy
I was there in Miami last Summer. The taxi charges from Miami airport to the Port of Miami was flat rate $21.00. If you have 5 family members you can take minivan taxi. It also has flat rate similar to regular taxi. You can always bargan with drivers.