Partas Bus Lines, as a company, was incorporated by Luis Chavit Singson and Rolito Go at Laoag (Ilocos Norte).

[6][7] The principal provincial terminals are at Laoag, Vigan, Candon, Bangued, Baguio, San Fernando, La Union, and, starting in 2014, a sub-station in Pagudpud, Ilocos Norte.

In Metro Manila, the main hub is at Cubao, Quezon City, which deploys trips to majority of its provincial destinations, except for Baguio.

Partas also has inter-provincial trips in Northern Luzon, running between Baguio, Vigan, Laoag, Bangued, Abra, San Fernando, La Union, Bolinao, Pangasinan, Tuguegarao, Cagayan and Santiago, Isabela.

[12] The list includes: Former: The company's official logo is Road Runner which is displayed, either standing or running, on most buses, with the name 'PARTAS' written in capital letters.