A flight from Surat Thani to Bangkok Suvarnabhumi, which has 0 stops, is 491﷼ which is the least expensive round-trip domestic flight that Hahn Air Systems offers. For a one-way domestic Hahn Air Systems flight, the cheapest route is Bangkok Suvarnabhumi to Surat Thani (0 stops) for 240﷼.
Flying with Hahn Air Systems from Oita to Incheon Intl is the cheapest flight we could find at 760﷼ per ticket. This is an international round-trip flight with 0 stops. For a one-way international Hahn Air Systems flight, the cheapest we could find was for 349﷼. This is a flight from Incheon Intl to Hanoi Noibai with 0 stops.