Fully paved National Highway 5 runs northwest from Phnom Penh via Pursat to the county's second largest city, Battambang. All buses between Battambang ($2.50 from Pursat) and Phnom Penh ($5 from Pursat) will stop here. Buses run every half-hour in the morning and early afternoon. Buses take 4 hours to Phnom Penh and 1.5 hours to Battambang. All the major bus companies service Phnom Penh. Sorya and Capitol Tour are the most reliable big names. Capitol Tour runs the lastest afternoon departure from Phnom Penh at 2:00pm, and sometimes 3:00pm.
You can book a Private Taxi online in advance for a few dollars more.
Bus Ticket Online is available and you can check below: