Star Schema can only be implemented in Infocube. DSO is just a flat structure(2 dimensional). But Infocube is multi-dimensional.
I suggest you to create a DSO first and create Cube on top of DSO. This approach will be optimistic.
Standard DSO Design :
Key Fields : Flight Num, Carnumcod, Agt cod
It all depends how granular your data want to get stored in DSO. You can have key fields according to that.
Data Fields : Rest all fields could be in Data fields(chars and KFs)
Cube Design :
Your screen shot is your cube design. Create separate dimensions according to your schema and keep the respective chars under them. Keep all Key figures in KF section in the cube design.
Create transformation and DTP between Standard DSO and Cube
Follow this doc: http://scn.sap.com/docs/DOC-11236
Regards,
Suman