Which cruiseline has the smallest upcharge for solo travellers?
Upcharge for solo travellers
For more major lines, you pay the price as though there were two people - double one person. Sometimes there are 150% deals. But look into Norwegian and Royal Caribbean, they have studio cabins which are meant for one person on some ships.
If you like River Cruises, American Cruise Line has single occupancy staterooms!
The newer Norwegian ships have singles cabins made specifically for solo cruisers so there is no up charge.
I would check either NCL or RCCL.