If you aren't careful, your Carnival cruise could quickly become as expensive as an Oceania one.
Peruse any of the "US' most budget-friendly cruise lines" lists, and you're sure to find Carnival somewhere near the top. In 2024, its most affordable itinerary is $164 per person for a four-night sailing from Miami — more than $20 cheaper than Royal Caribbean and Norwegian's least expensive ones.
That's about $40 a day for food, accommodations, onboard entertainment, and the ability to see several destinations in one vacation.