Split and Dubrovnik are linked by road and, in summer, by sea. No railway connects them. Of the three registered catamarans that run the corridor, all are commercial lines and none carries a vehicle, so a hire car means driving.
The four options, and which of them are real
This is a move down a coast with no rail link and a sea route that is seasonal by design. Most guides list the options without saying which of them anyone is contracted to provide. The register does say, so start there.
| How | In the state coastal register | Takes your car | Where it leaves you |
|---|---|---|---|
| Direct catamaran | Yes — 3 routes, all commercial | No | Gruž, Dubrovnik’s port |
| Island-hop on state lines | Yes — lines 9807 and 9808 in the south | No | Gruž, via Korčula and Mljet |
| Road | Not a coastal line | Yes | Anywhere you choose |
| Rail | No line exists between the two cities | No | — |
| Cruise ship | Not a registered coastal line | No | Dubrovnik cruise terminal |
The rail row is not a hedge. There is no railway line between Split and Dubrovnik, which is why every search for one ends in a bus timetable; the question is answered properly on the Split to Dubrovnik train page. The cruise row is there because cruise calls are not scheduled transport and cannot be used as one.
It is worth being clear about what the register is for. It records what the state has contracted to provide and what commercial operators have licensed themselves to run. It does not record roads, coaches or aircraft, so their absence from the table is not a judgement on them. What it does mean is that the sea option comes with a documented obligation attached, or in this case with a documented lack of one, while the road simply exists in every month of the year.
Assuming the sea route is available whenever you travel
The 3 direct services are all commercial lines. A commercial line carries no public service obligation: nothing in the register requires it to sail, and 17 of the 68 registered routes are in that category.
The state fallback does not fill the gap either. Line 9807 reaches Korčula and Mljet’s Polače only between 3 July and 30 August; the rest of the year it runs Sobra–Šipanska Luka–Dubrovnik alone. Outside high summer the honest answer for this corridor is the road.
Which one is right for you
Two questions settle it: whether you are carrying a vehicle, and when you are travelling. Everything else is preference.
What you are bringing
When you are travelling
The coach route →
One practical note for the summer answer. The catamaran calls down the island chain, so it is a day out rather than a transfer, and the same fare buys the scenery. If you want the fastest possible move between two hotel rooms, that is not what the boat is for.
What do you need to work out next?
The move is settled. These come next.
Where to stay
What waits at the far end of this run?
Ferry tariffs run off-season from 28 September to 31 December.
Getting around
What is the coach actually like?
It is the only option that runs the corridor every month of the year.
When to go
Has the boat stopped by October?
The tariff season ends on 27 September and the commercial lines follow it.
Planning
Could I make this leg a cruise?
Line 9807 reaches Korčula and Polače only between 3 July and 30 August.
Ferry data: Agencija za obalni linijski pomorski promet (ZOLPP), 2026 state coastal line register and per-line timetables.