Avalon operates a range of different ships both in Europe and around the world. Therefore, the number of passengers is going to vary. For ships in Europe, you are going to find approximately 150-175 passengers on board. These passenger numbers are going to fluctuate based on how popular a particular cruise is as well as when the cruise is taking place. That said, at no point during our cruise did we ever feel cramped, crowded, or that this ship was too small.