Largest airport in the Midwest

OHARE

["This major Chicago hub shares its name with a famous naval aviator and is often abbreviated as ORD on flight boards."]

The clue asks for the biggest airport in the Midwest, which is Chicago O’Hare International Airport. It’s commonly called "O’Hare" for short, so the answer drops "Chicago" and "International" to fit the crossword’s brevity. The name comes from naval aviator Edward "Butch" O’Hare, a WWII hero honored by the city. If you’ve flown through the region, you’ve likely heard of it—it’s one of the busiest hubs in the U.S.