On all long distance trains, seat reservation is mandatory. On TGV high-speed trains, reservation is mandatory. During July and August, advanced reservation is recommended. Before boarding, all passengers must check in at the shipping line pier office. Passengers wishing to stop over at Corfu or Igoumenitsa must say so upon delivery of the steamer ticket.
Advanced reservation is mandatory if cabin accommodation is requested.
For the months of July and August, reservation is mandatory whether cabin accommodation is request or not. Always check the schedule. Advanced reservation is recommended in June-August. Eurailpass holders get free passage on day sailings but pay for cabin space. Upgrade to higher classes at extra charge.