Well, let’s define the different cosmic horizons:
ONE. The Cosmic Event Horizon is 16 billion light years away, it’s the farthest distance you can travel to and still find some stars. Once you reach it you won’t see anything beyond (only eternal darkness) because every star shall be traveling away at a greater than c speed (they still shall exist but physically unreachable).
TWO. The Observable Universe Horizon is 46 billion light years away, it’s the farthest distance you can observe stars using telescopes. Beyond that distance the light of stars haven’t had enough time to reach us and never shall because beyond that boundary all stars and galaxies are traveling at a greater than c speed. Beyond that limit there are many more billions of galaxies we shall never see.
THREE. The end of the Universe is something between 20 or 500 times (in volume) the size of the OU, and of course is absolutely out of any possible reach. Within the OU bubble we live in, we only measure flat Euclidean geometry, but near the end limits of our universe the geometry of space is so twisted that you find Riemannian geometric space structures which only allow you to travel following curved trajectories even though your navigation instruments show that you are traveling in straight trajectories (you could travel back to your departure point without even noticing it). A pictorial sketch of our Universe would be something like this: