Originally Posted by
m907
You might want to keep it overnight just in case of emergency or if your flight is delayed or canceled, but if your flight is in the morning and the scheduled return time is noon, it probably wouldn't make much difference.
That is one important consideration depending on how early one's departure is as well as insuring shuttle availability first.
Example: I checked into the Fairfield Inn Louisville Airport around 9 pm in the current COVID era. At check in, I asked about the shuttle given I was considering departing even earlier than planned (9 am) so that I could standby for an earlier flight (6 am).
Toward that end, I told the front desk agent that I was intending to go fuel up my rental and drop it off and would take the shuttle back to the hotel. However, she informed me that a) the shuttle driver had not reported in for work that day and b) she was the only one at the property and wouldn't be able to leave so I'd have to take an Uber/etc. to get back.
Needless to say, I refueled the rental and kept it so that I could get to the airport and drop the car off first thing in the AM.
David