Open tickets aren't available, so you'll need to choose a specific date and time when booking your trip.
Some ferry companies may offer extra flexibility and allow you to travel on any sailing within a set time period from the date or time you've booked, if this is the case we'll let you know while you're making your booking.
To give yourself the most flexibility, consider choosing a flexible ticket type or adding cancellation cover -these options will be offered as you make your booking.