Dumai is well connected by Road from [wiki=3b56a6b879942501d9f0f3b3d234351b]Pekanbaru[/wiki] and [wiki=002d58e7320e036561568d54ac4b17ae]Medan[/wiki]. It takes appx 5 Hrs to reach Dumai from Pekanbaru which is capital city of Riau Province. Mode of transport is either by Bus or by Travels (Shared Car Pool). The cost appx IDR 70,000/- per person by Travels and IDR 50,000/- per person by bus. If you book the full Car it is IDR 450,000/- appx from Pekanbaru. The roads are not good.
Also it is connected by Bus to Medan whick takes 10 hrs. The cost of travel wil be appx IDR 150,000/- to IDR 200,000/-per person depending upon the Bus.
There is a Airport in Dumai.
Starting from September 2014 Transnusa runs "Public" flights to and from Dumai-Jakarta, Monday,Tuesday,Wednesday,Thursdays,Friday and Sunday. Also there are two flights three times a week service operated by Pertamina and Chevron ( Oil Producing Company) for their internal employees weekly from Jakarta, duri and pekanbaru.