Cairo Boston Flights Find The Cheapest Price For Cairo Boston flights With Travco Holidays! Boston is the capital and most populous city of the Commonwealth of Massachusetts in the United States. The city proper covers 48 square miles (124 km2) with an estimated population of 694,583 in 2018, making it also the most populous city in New England. in addition to Logan International Airport, officially known as General Edward Lawrence Logan Airport, Boston Logan is an international airport in the East Boston neighborhood of Boston, Massachusetts, United States. It is the largest airport in both the Commonwealth of Massachusetts and the New England region in terms of passenger volume and cargo handling, as well as the 16th-busiest airport in the United States, with 38.4 million total passengers in 2017.