I saved $230 by using National at the Dolphin last week. However, I have seen the airport be cheaper before. I always check all locations for my dates & the prices do vary. I was not charged a drop fee to return to the airport, either. I took the bus to Hollywood Studios and then you can walk or boat to Dolphin. I saw a shuttle picking up people in the Lost & Found lot also. Last year, we had friends find a car at Shades of Green 1 week prior to their trip for over 50% less than their Dolphin reservation. They went to Downtown Disney & grabbed bus for SOG, but you could go to any park to change buses, they just happened to be at Saratoga Springs that trip. I would definitely look around. The prices seem to have less fees & surcharges off airport property.