A distressed circular badge graphic sits at the chest, centered and worn-in, with ORD in bold block letters at the core. Around it: the exact coordinates of O'Hare International Airport, four stars, Est. 1944, and Chicago, Ill., USA. The design looks like it has already lived a life, which is the whole point. This is available as a unisex/men T-shirt, long sleeve, and kids tee. Available in black or navy blue.
For people who know this airport personally, not just as a layover. Wearable as a souvenir, giftable as something that actually means something.