The wikipedia article says you can travel the diameter of our galaxy (including coming to a stop relative to your destination) in 24 years ship time and 226,000

The wikipedia article says you can travel the diameter of our galaxy (including coming to a stop relative to your destination) in 24 years ship time and 226,000 years Earth time. The sun will enter the end of its lifecycle in about 7.6 billion years so you'd have to make over 30 thousand such trips from one end of the galaxy to the other, putting you at over 700,000 years old. Traveling between galaxies is another matter, however. The distance from the edge of the Milky Way to Andromeda is about 2.5 million light years. That journey would take 55 years ship time or slightly more than 2.5 million years Earth time and Andromeda really isn't that far on the scale of galaxies. Leaving a solar system might still allow some sort of interplanetary trade (in historic items mostly, since they'd be pretty old by the time they got anywhere) but leaving a galaxy means cutting all ties forever. Don't worry about it. You can travel from the Milky Way to Andromeda and back 1500 times before the sun explodes.