Boat and ferry travel is often an overlooked benefit of rail passes. Ship travel is a pleasant and scenic enhancement to rail travel. Travel on ferries and shipping lines is either free or at a reduced fare with many passes. Ferry lines make countries that are not physically contiguous count as being adjacent for the Eurail Select Pass. See specific passes for more details.

Here are some of the shipping lines that can help with travel through Europe:
• DFDS: Denmark - Great Britain
• Color Line A/S: Denmark - Norway
• Silja Line: Finland - Sweden
• Irish Ferries: France - Ireland
• Stena Line: Great Britain - The Netherlands
• Blue Star Ferries: Greece - Italy
• Hellenic Mediterranean Lines: Greece - Italy
• Superfast Ferries: Greece - Italy
• Transmeditteranea: Spain, Spain - Morocco
• TT Line: Sweden - Germany