This is the directed network of flights between US airports in 2010. Each edge represents a connection from one airport to another, and the weight of an edge shows the number of flights on that connection in the given direction, in 2010.
Data downloaded from http://konect.uni-koblenz.de/ orginaly from http://toreopsahl.com/datasets/#usairports
Jerome Kunegis. KONECT - The Koblenz Network Collection. In Proc. Int. Web Observatory Workshop, pages 1343-1350, 2013.
Tore Opsahl. Why anchorage is not (that) important: Binary ties and sample selection, 2011.