NOT KNOWN DETAILS ABOUT ICELANDAIR FLIGHT CHANGE OPTIONS

I just booked a 5 day, six night stopover on the 1-way ticket. I’m traveling from Boston to Bergen, Norway to affix a tour team. I can get off in Reyjavik and then go on to Bergen. The tour finishes in Helsinki so I couldnt book Roundtrip, And that i wasnt necessary to. At the same time, the concept states that info concerning Qatar Airways offi