The 1989 Vitosha New Otani Open was a women's tennis tournament played on outdoor clay courts in Sofia, Bulgaria that was part of the Category 1 tier of the 1989 WTA Tour.

The tournament was held from 31 July until 6 August 1989.

Second-seeded Isabel Cueto won the singles title.

Isabel Cueto defeated Katerina Maleeva 6–2, 7–6(7–3) Laura Garrone / Laura Golarsa defeated Silke Meier / Elena Pampoulova 6–4, 7–5