There are many routes to Pathum Thani:

a) Bangkok-Bang Khen-Pathum Thani
b) Bangkok-Nonthaburi-Pak Kret-Pathum Thani
c) Bangkok-Bang Yai-Bang Bua Thong-Lat Lum Kaeo-Pathum Thani

By Bus

Pathum Thani can be reached by the following buses:

Bus No. 33 (Sanam Luang-Pathum Thani)

Bus No. 90 (Chatuchak-Tiwanon Road) connecting a Rangsit-Pathum Thani bus

Buses No. 29, 34, 39, 59, 95, 503 to Rangsit, then connecting a Rangsit-Pathum Thai bus

Bus No. 104 (Victory Monument-Pak Kret), then connecting Bus No. 33 or Bus No. 90

By Train

There are regional trains from Bangkok to Ayuttaya (Bang-Pa-In) and Lop Buri which stop at Lak Hok, Rangsit, Chiang Rak and Thammasat station. But you must check time table before. Services north- and southbound run in intervals ob about 90 mins. - ordinary train fares to Bangkok are 9 baht. All trains on the northern and northeastern route pass through the province. Rangsit being the only major station with a stationmaster's office and advance ticket sales on all Thai routes. Express trains don't stop at the minor stations.