Alamo at the Walt Disney Dolphin is open daily from 8:00 a.m. to 4:00 p.m.,
but you can return your car outside of those hours too.
At the Dolphin, you return your car at valet parking, regardless of whether the Alamo/National counter is open or closed. The valet parking attendant fills out a form noting the mileage and fuel level. Make sure the attendant understands that you are returning the car, not just having it parked.
If you return after hours, the Alamo/National staff will close out your bill and email a receipt to you when the counter reopens.
Depending on when you rented the car, you might pay for an extra day. For example, if you rented the car at another location at 6:00 p.m. on a Tuesday, and you return it at the Dolphin at 5:00 p.m. on a Tuesday a week later, your car will be checked in at 8:00 a.m. on Wednesday, so you'll pay for 8 days, not 7 days.
This return process is not unique to the Dolphin. The usual practice for after-hours returns, regardless of the car rental company and location, is that the rental is closed out when the office reopens. The only difference is that at most locations you park your car and put the keys in a slot rather than going to valet parking.
