Yes, we did this last time because we had a coupon for a free day. The coupon was unable to be used for a pickup at the airport on 2/16, so we rented one car from 2/16-24, pickup at the airportna dn return to the Dolphin, and then we used our free day coupon to pick up at the Dolphin on 2/24 and return to the airport on 2/25. Just be aware that the desk at the Dolphin is only open 8-5, I think.