What is the airport code for Boston, Massachusetts?

The airport code for Boston, Massachusetts, is indeed BOS. Airport codes are typically derived from the name of the city or the airport itself, and BOS is the International Air Transport Association (IATA) code for Logan International Airport, which is the primary airport serving Boston.

Understanding the airport codes can be facilitated by recognizing that they often consist of the first letters of the city or notable airport. In this case, "B" stands for Boston, "O" stands for Logan, and "S" is used to complete the three-letter code format.

The other codes, while they may represent real airports, do not pertain to Boston. For instance, BTR is the code for Baton Rouge, Louisiana; BUF is for Buffalo, New York; and BRU is the code for Brussels Airport in Belgium. Hence, BOS is the only correct representation for Boston within this set of choices.