My husband and I just did this in January (took a cab from POFQ to Sea World). It was $25 from POFQ to Sea World, and $35 coming back due to traffic. We found it very convenient, and less of a hassle than renting a car. There is also a Lynx bus that you can take from DTD that will cost $2 per person. The problem with that is the travel time involved. Depending on the bus schedules, you could be looking at an hour or two to go what would take 15 minutes in a cab. For that reason we opted for the cab.