It is possible to travel to Iasi by plane. The city of Iași has an International Airport that offers several daily flights to Bucharest as well as direct flights to many international destinations.
The Airport is connected to the city centre by a bus line (line 50 - fare for 2 journeys: 5 RON) and by taxi services (different day/night fares depending on the time you arrive, but a journey to the city centre should not cost more than 25-30 lei / 5-7 Eur).
Most of the hotels recommended on the Accommodation page are situated in Piața Unirii (Union Square), which is within walking distance of Alexandru Ioan Cuza University of Iași (see image below). Alternatively, you may get to the University by bus or by tram (fare for 2 journeys: 5 RON / 1.05 Eur).
It is not possible to pay for public transport in Eur.