The airport bus operates in connect with most of the flights departures to and arrivals from Arlanda and Bromma.
The airport bus ticket can be bought directly on the bus by credit/debit card (excluding Maestro and Visa Electron) or at Ultrabussarnas information (Reseinfo) at Vasaplan. No cash payment. Military ticket is not valid. With the airport bus ticket, you have free transfers within two hours, to/from Ultras conurbation lines.
Vasaplan - The airport, about 20 minutes.
The airport - Umeå university, about 15 minutes.