The aggregate rating of MSC Opera is build on scorse given by the following portals:
| Aug / 24 | Sep / 24 | Oct / 24 | ||
| cruisetimetables.com | 3.0 / 89 | 3.0 / 89 | 3.0 / 89 | |
| seascanner.com | 7.5 / 64 | 7.5 / 65 | 7.6 / 67 | |
| cruisemapper.com | 4.0 / 1 | 4.0 / 1 | 4.0 / 1 | |
| cruiseline.com | 2.9 / 64 | 2.9 / 64 | 2.9 / 64 | |
| cruisedirect.com | 3.2 / 13 | 3.17 / 13 | 3.17 / 13 |
MSC Opera is also ranked in: