The easiest way to travel to Oulu is to fly to the Oulu airport. A taxi or local bus lines 8 and 9 will take you from the airport to the city center. You can also take bus line 8 directly to the Linnanmaa campus. Another option is to fly to Helsinki and take the train (ca. 6 hours) to Oulu.
Most hotels are located in the city center. You can easily travel from the city center to the Linnanmaa campus by bus lines 1,2,3,8 and 23. You can buy a single ticket (3,30 €) on the bus either with cash or as a mobile ticket. More information on local bus services: https://www.ouka.fi/oulu/public-transport/
You can find more information on travel and accommodation at https://visitoulu.fi/en/arrival-overnight/
Last updated: 12.11.2019