However, as mentioned there is only few travel dates available at this rate level. You should not delay with your booking if you are planning to visit this incredible island of "ice & fire". Country with its unique landscape offering from spotting volcanoes, waterfalls to whale watching and discovering incredible Geysir (this is actually where word "Geyser"came from) We are adding samples of travel dates currently available for said price below. (we have found the cheapest airfare between May and June 2015).
Booking samples
DE - Dusseldorf - Reykjavik for €120
NL - Dusseldorf - Reykjavik for €120
Berlin - Iceland for €223
Booking is also possible directly with Air Berlin (use +-3 days searching tool to find out cheapest deal available)
Booking sample of cheap flight from Germany to Iceland for €120 here. In this case the flight is departing form Dusseldorf on 5th of May and returning back from Reykjavik to Germany on 13th of May 2015.