Potomac Air was a small regional airline that operated scheduled passenger service primarily out of Washington Dulles International Airport, focusing on routes connecting the Washington, D.C. metropolitan area with destinations along the U.S. East Coast. The carrier operated as an independent regional airline and sought to fill niche markets with shorter-haul routes not heavily served by major carriers. It utilized turboprop and small regional aircraft to serve its route network. Potomac Air ceased operations in the early 2000s, having struggled to maintain financial viability in the competitive regional aviation market, particularly in the aftermath of the September 11, 2001 attacks, which severely impacted demand for air travel across the industry.