
Read my posting about the airport at Khon Kaen Airport KKC.
Train :
There is the train-station within 5 min from Pullman Hotel. It is along the line Bangkok - Nong Khai so you can go north to Udon Thani, Nong Khai and even Laos or south to Khorat, Saraburi and Bangkok. There is a good air-con sleeper night train going and coming from Bangkok. There are 4 trains per day leaving & arriving Khon Kaen from/to Bangkok but I am sure that there are also "local trains" running in the province.
Bus :
Then there are
Update!
As of 1 October 2013 it is in the planning that bus-terminal 1 and 2 (in the city) will closed and all buses for Khon Kaen will stop at bus-terminal 3 along the south-western side of the rind-road.
More update!
The word on the street is that the opening of the new bus-station is delayed by 4 months due to the fact that the government of Khon Kaen suddenly realized that the new bus-station would create huge traffic problems.
Extra Update at 29 July 2014
Bus terminal 3 is open .... and the other 2 also! TIT