In Pärnu, public transport is provided on city buses which operate regularly from 6 am to midnight.
You can buy single tickets from any kiosk for 0.64 EUR (0.32 for students) or from the driver for 1 EUR. Be sure to stamp your ticket on board or risk a hefty fine if an inspector catches you. Other options sold in kiosks include a one-day ticket, 10-day ticket and 30-day ticket. These are valid for the dates stamped on them.
Bus schedule information can be found at: peatus.ee/en. This web page helps you to navigate public transportation network efficiently. You can also check timetables for bus stops and bus-lines.
For transportation headed out of Pärnu, check the bus timetables and prices at: www.tpilet.ee (you can buy tickets online)