The are 5 different ways across 2 unique modes of transportation to help you travel from Bauru to Bandeirantes. If you're only considering the price, you should check out the bus out of Bauru towards Cornélio Procópio, as it is the cheapest to Bandeirantes. It's common to find tickets for as low as $18. Viação Garcia operates from Bauru to Bandeirantes, so you book your trip with them! Book as soon as you can, as there may be limited availability.
On your trip from Bauru to Bandeirantes, it is best to book as soon as possible. It won't necessarily help reduce your price by a large amount, but will ensure that you have a spot on the bus or train.