First, you will sell the B737-800 you got when you began the game with the high-price sales.
Then purchase a Dassault Mercure for about $800 000, if you don't have enough money from the sale of the B737-800 then you can use the money you got when you started the game.
You will want to create a new route that you will suggest as a by-the-demand option to obtain the best results.
Enter a contract catering with Sky Fish Inc, and advertise as much as your financial condition will allow.
Try using worker morale of more than 80% and to prevent legal action for raising employee compensation, rather than grant raises try hiring staff because the longer the airline's financial state is suppressed the worse it will be.
Buy fuel when it is $500 which is a good deal.
Once the Dassault Mercure reaches 200 units. You will want to buy a McDonnell Douglas for $7 million.
After the McDonnell Douglas reaches 200 units. You will want to buy a bigger plane made in Ilyushin IL-96-400 for $41 million.
Then you can sell the old planes and buy the IL-96-400 to 600 units.
Slowly, make your way into a new aircraft fleet that KR-860.