This is some sort of a continuation of my previous post.
When I was booking for my flights within Indonesia, I used Tiket.com. Due to my preference in flight times, my inbound and outbound flights to Semarang were of different airlines. My flight back to Jakarta was with Sriwijaya Air.
Sriwijaya Air is Indonesia’s third largest airline. It is considered a medium-service airline – not a low-cost carrier but not quite a full-service one. They mostly serve domestic flights but they do have some international flights within Asia.