Terminals at MKE

All four concourses at MKE feed one shared TSA checkpoint The Main Terminal at Milwaukee (MKE) runs everything through a single central security zone serving concourses A, B, C, and D, so a gate change from Delta on C to Southwest on D is just a short airside walk instead of a terminal change. Air Canada, Southwest, United, Volaris, Alaska, Allegiant, American, Frontier, Delta, and JetBlue all check in on the same landside level, with shared ticket…