connecting interior staterooms

Our first family cruise we all stayed in 1 room. We then discovered connecting stateroom rooms on Royal Caribbean, it was FANTASTIC. we like to cruise interior staterooms, yes for the price, but also for the darkness--kids will sleep in if they still think it is night.

What cruise lines, and specifically what ships offer connecting staterooms?

I think all cruiselines offer connecting cabins....some ships have more than others. Check the deck plans on the ship you'll be sailing...they are clearly marked!

Many Princess ships do not have connecting cabins. I know Celebrity M class do.

Many of the Carnival ships have connecting insides.

Some of the ships have insides connecting to balconies.

HAL Vista and Signature class ships have very large interiors that connect on Main deck. EM