Single supplement

Asking for a friend, does the single supplement depend upon the itinerary? Or is it basically the same rate on all itineraries?

Unless there is a promotion, single supplement is 100%.

your friend could check the current offers to see if anything is of interest

some are category specific

https://www.oceaniacruises.com/special-offers/single-supplement/

but normally as Lou said it is 100% SS

Asking for a friend, does the single supplement depend upon the itinerary? Or is it basically the same rate on all itineraries?

Yes , your correct it can vary according to many factors, class of cabin, length of cruise, how well the cruise is selling.. I have seen 125% 150% and 175% in years past. Your travel agent can keep a look out for you.

Generally, they give the discount supplement., from my experience, to people who book a" veranda class "of higher cabin. So in the final analysis it might be cheaper, overall, to book an in expensive inside and pay 100% on a much lower fare.

Thank you for the information!

The single supplement should never be more than the “cruise only” fare! If so, you need to learn how to “ work “ the system!