Great question - DTW to HTI just means Detroit Metropolitan Wayne County Airport to Hamilton Island Airport. Now you’ll know what these unique codes when you look for flights! This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Grand Rapids Gerald R. Ford Intl Airport (GRR), Traverse City Cherry Capital Airport (TVC), Flint Bishop Airport (FNT), Lansing Capital City Airport (LAN), Kalamazoo Intl Airport (AZO). Find deals