What Airlines fly out of Concourse B in AtlantaHartsfield-Jackson Atlanta International Airport (ATL) is known as the busiest airport in the world, and Concourse B is one of its vital hubs. Serving a significant portion of domestic flights, Concourse B is a bustling center of activity that caters to both business and leisure travelers. Understanding which airlines operate from Concourse B can help you better navigate your trip and enjoy a smoother airport experience. Here’s an overview of the airlines that fly out of this prominent concourse.