When General Electric chose downtown Boston as the site of its new headquarters last year, one draw for the global conglomerate was the proximity of the Fort Point neighborhood to Logan International Airport. The same easy access to air travel was also a deciding factor for officials at Visiomed Group in February, when the French health-tech company opened its first U.S. office in Back Bay: a short flight, relatively speaking, to Paris.

Logan International, located just a few miles from the city’s…