Boston Logan is an unusual airport for a major airport in that it has no major hub carrier. Delta and American are the major operators there. LCC service is provided by Jet Blue. Southwest, notably, continues to avoid the airport with service to nearby Manchester, NH and Providence, RI. The airport is arranged around a semi-circle with multiple terminals much like JFK. Logan is perhaps most dubiously remembered as the origination of 2 of the jets hijacked during the attrocities of September 11th.