A galaxy had a large range, especially an elliptical galaxy like the Domini System. Its diameter was more than four hundred thousand light-years. Even a sub-light speed engine would need four or five hundred thousand years to pass through the Domini System, so space-jumping became an essential means of interstellar travel.
The pirate base that Jiang Fei and the others were heading to was about seventeen hundred thousand light-seconds away from the Alpha Sector. Without Warp Core Engines, it would take the players about two days to get there.
Turandot, where Jiang Fei was located, was even further away from the pirate base. But with the help of the Phase Warp, they arrived at a position that was less than thirty light-seconds away from the pirate base in only half a minute.