Boston Logan International Airport — Boston, United States

Boston Logan International Airport, coded BOS, opened in 1923 and ranks among the oldest continuously operating commercial airports in the United States. Named for General Edward Lawrence Logan, the airport sits at 20 feet above sea level on a peninsula in Boston Harbor and runs six runways, an unusually complex layout shaped by the site's tight urban footprint. BOS serves as a hub for Delta and JetBlue and connects Boston to destinations across the globe, supporting the region's dense concentration of universities, hospitals, and technology companies. Its harbor-side location means several runways intersect at odd angles, and wind direction plays a large role in which ones controllers use on a given day. A water taxi service and the Silver Line bus rapid transit route both connect the airport to downtown Boston, giving travelers alternatives to driving through the city's notoriously heavy traffic, especially during rush hour when the harbor tunnels back up for miles in every direction.