What is the longest cruise vacation available?

You can link as many cruises you like together. It can be endless!

Yeah, those are the longest. The QE2 (Queen Elizabeth Two) also does a 109 or 126 day cruise around the world.

The longest cruise vacation I know of at this time is 109 day world cruise, Voyage of the Seven Wonders, operated by Cunard. In January, 2007 there will be a cruise for 126 days aboard Silversea Cruise Lines ship Silver Shadow, sailing from Ft. Lauderdale, Florida and ending in New York. Unfortunately, my husband says I won't be on it.

I saw a news report years ago about a widow who sold her house and moved onto a cruise ship. I don't know if she was able to lease it or just pay for continuous cruises. She was happy and her sons didn't mind seeing their inheiritance being spent on her comfort!
I think it would be nice to have that option.

The world cruises are the longest and vary from year to year by cruiselines but average between 112-126 days.

However, you can literally get on a ship and stay on provided you have paid for it and not get off.

I met a gentleman years ago on Princess that was over 200 days. He had no idea the time of day, day of week or day of month. He seemed to be a lonely man,

Around the world and back!