There are many cruise lines, but not all of them are suitable for the US audience.
Mass-Market:
Big 4 comparison:
| Line | Features | Families | Ship Size | Ship to Passenger Ratio | Price |
| MSC | 4th in class | 1st in class | 2nd in class | 3rd in class | 1st in class |
| Royal Caribbean | 1st in class | 3rd in class | 1st in class | 4th in class | 3rd in class |
| NCL | 2nd in class | 4th in class | 4th in class | 1st in class | 2nd in class |
| Carnival | 3rd in class | 2nd in class | 3rd in class | 2nd in class | 4th in class |
Premium:
Upper-Premium:
Luxury:
Ultra-Luxury: