The main bus station is rather inconveniently located about 2.5km east of the train station but, luckily, someone took me there in their car as she was heading that way. Extensive bus services connect Phitsanulok with Chiang Mai and Bangkok. As Phitsanulok is a major transportation hub, there are also regular services to the North-East. Phitsanulok is about 390 km from Bangkok and buses take 5-6 hours for the journey. I took a bus to Sukhothai which about an hour and cost 33 baht.
If you choose train for transport to Phitsanulok,you can catch so many trians which run to North area like Chiangmai ,Sukhothai or Denchai. All kinds of trains 're available and the departure times 're all the day. The trip 'll take about 5 and a half hours to 7 hours which depends on a kind of train.
Booking 's the must ,esp. on nation holiday.
Phitsanuloke transportation 's very good service with 13 bus route around the city.And there 're 2 bus stands where the bus begin. 1. at the bus stop near train station. 2.at the bus terminal outside the city. It 's so easy to move around by no hiring tuk tuk ,though sometimes you must wait for a long.........time.
It is great to take a bus in Thailand, as local people are very friendly, a minor problem is that some of them do not speak english. But it is also funny to explain things using your hands and feet . . . .
Actually I took a bus to travel FROM Phitsanulok to Sukothai. The trip was 1 hour and the price was 23 bath (that is about 0.5 US$), so pretty cheap.