A small snippet from their VERY minimalistic website:
Viking Airlines started operations on 10 May 2003.
McDonnel Douglas MD
-83, with 161 economy seats are used for charter operations throughout Europe.
Two of this type are based in Heraklion, Greece operating charter flights on behalf of a number of Tour Operators destinations throughout Europe.
Also available for Ad Hoc Charter. Contact us at email@example.com for more information.