My trip to Finland had been reserved, I will stay in Helsinki for 3 days, details as following:
1) 1st day: arrived in Vantaa airport on 14:40pm & will take bus 615 to the hotel in downtown.
2) 2nd day: will travel in Helsinki by bus, tram & metro.
3) 3rd day: will take bus 154 from Kamppi to Espoo, and take bus 42 & bus 18 in Espoo, finally take bus 106K back to Helsinki.
4) 4th day: back to Vantaa airport on 7:30am to catch the flight to Ivalo to start the new trip in the arctic circle.
If the 3 days regional ticket can cover my intended schedule? It can be used on bus, tram & metro in Helsinki & Espoo, right?