Originally Posted by Elvis90

The local hotels that have contracts with DAL make airport runs about every 1/2 hour. Sometimes they check to see if you're staying with them, but usually not.

Originally Posted by forgot to bid

There is a GO bus that runs back and forth, I've taken it... by mistake

Originally Posted by dragon

The main hotel shuttle will usually take you right to the airport. Much closer than the MSP training facility is to the airport.

There are also several other shuttle from the GO and parking areas to the terminal. I think you can find info on the DLNET and look on the drop downs for Atlanta Campus.