Frontier Airlines operates from Concourse D at Frontier Airlines PIT Terminal, a gateway for budget-conscious travelers in and out of Pittsburgh. Known for its ultra-low-cost fare structure, Frontier offers affordable travel options to a variety of U.S. destinations. PIT’s design and amenities make it a convenient and efficient airport for Frontier passengers, providing streamlined check-in, security, and comfortable gate areas for a smooth start to their journey. Here’s what to know when flying with Frontier from PIT, from arrival and check-in to security and boarding.