Inside the Amex Centurion Lounge at Charlotte Douglas International Airport. Photo: Courtesy of American Express What to expect: The USO Lounge is located in the Atrium. It's open from 6am until 8pm.

there’s a good chance that you’ll pass through the Charlotte Douglas International Airport (CLT) — it’s the one with all those rocking chairs. Airport Council International ranks CLT No. 7 ...