As a supplement to both of the answers to this question, there is another question implicit in yours - can you travel outside of the galaxy period? The whole purpose of Outbound Flight, as mentioned by Petersaber, was to use the Jedi to try and break through the Hyperspace disturbance beyond the edge of the galaxy, which was an energy barrier that apparently made travel outside the galaxy impossible. The Yuuzhan Vong found a way around this at Vector Prime and apparently the Silentium and Abominor, two extra-galactic droid races, must have as well since they came from the same galaxy as the Yuuzhan Vong and settled in the Unknown Regions of the SWG.
In addition, within the overall Galaxy there were seven satellites galaxies as part of the main galactic disk (the hyperspace disturbance was outside of this whole construct) and there was travel to and from these satellite galaxies, for instance the Nagai accomplished it, coming from the Firefist galaxy, and the Rebel Alliance had a base in the Rishi Maze.