Meanwhile, Terminal 5, the hub for international flights, is in its own building, accessible by a transfer bus. But Chicago O’Hare is conspicuously missing Terminal 4.

The Chicago Department of Aviation has opened 10 new gates in the East Concourse of O'Hare Airport's Terminal 5. The new gates are part of a broader $1.3 billion expansion and renovation of the ...

Delta Air Lines on Oct. 12 will move its Chicago O'Hare operations to Terminal 5 from Terminal 2. The move is part of a $1 billion expansion and renovation project "nearing completion at Terminal ...