SDQ refers to which city?

The correct answer is Santo Domingo, Dominican Republic. SDQ is the airport code for Las Américas International Airport, which is located in Santo Domingo, the capital city of the Dominican Republic. This airport serves as a significant hub for international and domestic flights, making it a key location within the Caribbean region.

The other options represent different cities but do not correspond to the SDQ airport code. San Diego, California, has a different airport code (SAN), while Saint Denis in France and Santo Domingo in Ecuador do not have the SDQ designation for their airports. Therefore, knowing the specific airport codes associated with cities is essential for identifying locations accurately in the context of airline operations and customer service.