The Alderaan Spaceport was a spaceport located at the planet Alderaan.
According to a personal calendar file, the Bajoran transport carrying Ibudan departed from this spaceport on stardate 46383. This file, along with others, was reviewed by Odo when he was conducting an investigation into the murder of Ibudan. (DS9: "A Man Alone")
This spaceport was only mentioned in writing.