As the song once said:

Einmal um die Welt (once around the world)

So planing my around the world trip here, I found this site which talk about the different possibilities to do around the world trips with RTW and the services.

And then they talk about AirTreks that helps planning those trips. And later, after doing my schedule with the places I’d like to go, I found that the price was not cheap but not that expensive, I mean. It was somewhat affordable.