My daughter plans to do just that for her
50th (her & her hubby) --it's a couple of
years off so she has gone into save mode
I'm giving her a Melborne-Athens return
air fare for her 50th but she will need
some idea of costs & ideas ,even some
people's experiences to plan her dream
birthday
Anyone care to give some idea,s apart
from the obvious web searching
Be a big help

Post in the cruise forum for better answers.

Thanks sassafrass. I will check as I wasn't
aware there was a section for cruising
Still new at this site so glad of your advise

Fossil41, In case you came back to this post, a couple of things.
Be sure to select the cruise before you book airfare because many cruises that do the Greek Islands start or end in Italy (Venice or Rome) or Turkey.
Your daughter should really think about the experience she wants. A cruise is a cruise experience and that is fun, but you don't have long evenings sitting in a cafe on an island in the evening, or sitting around a pool at a hotel looking at the view. On the cruise, you do have lovely sunsets, and great ports of call, but you are on each island only during the day and back on the ship for dinner and shows at night.

Sorry, forgot the other thing I wanted to post for your daughter.
For cruises, to get an idea of what is available, go to vacationstogo and look at their 90 day sticker. You have to join, but it is a safe site. To see what is available after that, fill in the form at the bottom of the web site. It will then give you every cruise for your date and destination.

Also, go to cruisecritic.com for reviews of cruises, ships, ports of call, etc. After she books, she can join the roll call for her ship on cruisecritic and get together with other cruisers to do shore excursions, etc.

There are also several real experts on the cruise forum here on Fodors.