UniGroup Worldwide Logistics  has renewed its long-time lease of office space at 370 McClellan Highway (Rte. 1A) in East Boston, one of the closest air freight facilities to Boston’s Logan International Airport. Representing the owner, 370 McClellan Highway LLC, was Exclusive Broker Richard McKinnon, Director of Brokerage Services for The Grossman Companies, Inc., of Quincy. The renewal is for 1,800 square feet. Still available in the building is 2,299 square feet of office space. For over 50 years UniGroup Logistics has been customizing transportation and logistics solutions combining the expertise of United Van Lines and Mayflower Transit, along with its global UniGroup Relocation division. Making the property at 370 McClellan Highway especially attractive for air freight and logistics firms is easy access to all the major roads. Based on international traffic, Logan is the country’s 19th busiest airport. Last year some 685,000 tons of cargo (and 29 million passengers) passed through its terminals.