I am taking a group of students to Canada tomorrow morning. I need to fly in tonight and stay at a hotel None of the hotels can get me to the International by shuttle. How do I go from Domestic check in area to the International check in area without going through security. I must meet them at the check in area in International to help them get their bags checked and check in for the flights. I am not sure what MARTA is. Is there a way to go by ground to international by domestic? Does this run at 3 in the morning?