Plenty of people see the Bay of Kotor in a day from Dubrovnik. It is the trip with the most reviews in the area, 487, rated 7.9/10, and the lower score has one explanation that appears in almost all of them: the wait at the border. This is what you get for €65 and what you need to carry.
If Dubrovnik is your only base, this is the way to see the bay in a day, and the reviews rate it: “Perast is very pretty though small, and Kotor a bit bigger but full of people”. What it cannot give you is the water: no Blue Cave and no boat to the islet. With a night in Kotor, the Blue Cave trip (€45, 3 hours) or Perast and the islet (€25, 90 minutes) do what this one cannot.
Details read on the operator’s Civitatis listing on 6 September 2026 (discounted price from €70; the valid one is in the booking process).
Another trip by boat
Another cave-and-lagoon boat trip: Comino’s Blue Lagoon (Malta), with its compulsory free pass. Comino Blue Lagoon →
Or the La Maddalena archipelago in Sardinia: a full day by boat between Spargi, Budelli and Santa Maria. Boat to La Maddalena →