During the two-day visit to Saudi Arabia, a close ally of Pakistan, Ashraf will meet King Abdullah bin Abdul Aziz.
An unnamed Foreign Ministry official was quoted by the Dawn newspaper as saying that the purpose of the visit was to reiterate the importance Pakistan attaches to its relations with Saudi Arabia.
During a meeting with Saudi Ambassador Abdul Aziz Ibrahim Al-Ghadeer on July 2, Ashraf had expressed a desire to visit the kingdom.
"I am keen to visit the kingdom, the Holy Land," Ashraf was quoted as telling the Saudi diplomat in a statement.
Ashraf became the premier last month after the Supreme Court convicted his predecessor, Yousuf Raza Gilani, of contempt and disqualified him for refusing to revive graft cases against President Asif Ali Zardari.
Gilani's last official trip was to Saudi Arabia.
More From This Section
He visited the kingdom to attend the funeral of Saudi crown prince Nayef bin Abdul Aziz.
A diplomatic observer told the Dawn that it was plausible for any premier to undertake a foreign trip to strengthen bilateral relations under normal circumstances, but a premier "facing a survival crisis at home would go on an overseas trip only for something very pressing".
The report said Ashraf "could be looking for Riyadh