Do you have full traffic-rights? What size is your company? Give us more information please. It is rather difficult to establish long hauls. It took a long journey for me to enter long haul-markets and finanlly the system functions.
Regulations will prevent you to establish a subsidiary with full traffic-rights with your current Swedish holding. You are allowed to operate cargo-flights but no pax. There are a number of countries who allow foreign investments with subsidiaries and full rights. Denmark is not one of those countries.
in yet again other words: it is impossible to have ANY longhaul flights from different countries. longhaul (sounds to me like out of EU or out of Africa) is only possible (for pax) from within your holding’s home country. you are free to operate flights within the EU, if your holding is there.
there is only one loop hole to that but it is complicated to achieve and possibly very unstable to sustain. so don’t worry about that for now. besides, please read the wiki and use the search feature of this msg board. thank you.