The 1989 Lufthansa Cup, also known as the German Open Championships, was a women's tennis tournament played on outdoor clay courts at the Rot-Weiss Tennis Club in West Berlin, West Germany that was part of the Category 5 tier of the 1989 WTA Tour.

It was the 20th edition of the tournament and was held from 15 May until 21 May 1989.

First-seeded Steffi Graf won the singles title.

[1] Steffi Graf defeated Gabriela Sabatini 6–3, 6–1 Elizabeth Smylie / Janine Tremelling defeated Lise Gregory / Gretchen Magers 5–7, 6–3, 6–2