Ever wonder why Chicago is ORD, why Charlotte is CLT (yeah, we noticed too), or why half of Canada’s airports sound like bad Wi-Fi passwords? This week, we put Josh’s 18 years of airline wisdom to the test and made him decode the nonsense behind city codes. Along the way, we detour into the sketchy wonderland of duty-free shops — because nothing screams “vacation” like buying cologne and a 4-pound Toblerone before a 6-hour flight.