What city does the code BDL correspond to?

The airport code BDL corresponds to Bradley International Airport, which is located in Windsor Locks, Connecticut, serving the Hartford metropolitan area. This makes Hartford, Connecticut the correct answer. The airport was named after General Bradley, a key figure from the region, and it functions as the primary airport serving the capital city of Hartford and nearby areas.

In contrast, Boston's airport operates under the code BOS, Buffalo's airport is known by the code BUF, and there is no airport in Bridgeport that is recognized by an airport code starting with BDL. This context reinforces why BDL is exclusively associated with Hartford, making it the appropriate choice.