The national brands allow it, a one-way fee usually applies, and the drive is 227 km, about 2 hours 49 minutes up the Forrest Highway. Here is what each company's terms say.
The national brands allow one-way hires within Australia, but a one-way fee usually applies and it is quoted at booking. Hertz says one-way rentals are permitted within Australia subject to availability and location restrictions, with the fee paid at pick-up (and not allowed on 4WDs). Budget charges either a predetermined One Way Fee shown on your rental document or A$2.28 per kilometre if you drop elsewhere without telling them. Europcar's terms say a one-way fee may apply, and Avis promotes discounted one-way deals on selected cars. Ask the operator for a Busselton-to-Perth quote before you book; the fee can rival the daily rate.
Busselton Airport to Perth is 227 km, about 2 h 49 min via the Bussell Highway, the Wilman Wadandi Highway bypass of Bunbury, the Forrest Highway and the Kwinana Freeway. There are no toll roads in Western Australia. Fuel up in Busselton or Bunbury; the Forrest Highway has long stretches without services.
The national brands allow one-way hires within Australia, but a one-way fee usually applies and it is quoted at booking. Hertz says one-way rentals are permitted within Australia subject to availability and location restrictions, with the fee paid at pick-up (and not allowed on 4WDs). Budget charges either a predetermined One Way Fee shown on your rental document or A$2.28 per kilometre if you drop elsewhere without telling them. Europcar's terms say a one-way fee may apply, and Avis promotes discounted one-way deals on selected cars. Ask the operator for a Busselton-to-Perth quote before you book; the fee can rival the daily rate.
Perth is about 227 km north, roughly 2 hours 49 minutes by car via the Forrest Highway and the Kwinana Freeway. Bunbury is about 56 km, around 48 minutes.
You will not meet a toll between Busselton Airport and Margaret River, or on the drive down from Perth. Tourism Australia notes that many capital-city motorways are tolled, but Linkt, the national toll operator, covers toll roads only in Sydney, Melbourne and Queensland, and none of Main Roads WA's driving-in-WA pages mention tolls. If you drive your hire car interstate, tolls there are billed back through the hire company (Budget's terms include a Linkt rental service fee of A$3.30 per tolled day).
Every desk at the airport in one place. Book before you fly; keys are at the terminal.