FRANKFURT to RIJEKA CROATIA

HI post looking for a cheap airline ticket from FRANKFURT to RIJEKA CROATIA, im aussie guy travelling mid june to europe, can email me at mark_g_evans@yahoo.com thank...mark...

Rijeka is a typical summer destination and not many airlines go there.
The only possibility I found is Tuifly. But unfortunately they are not going out of Frankfurt. Stuttgart and Cologne would be the cities closest to Frankfurt to use Tuifly. Both airports about 100 miles away from Frankfurt.