Split is worth flying into because of what leaves it by sea: twenty-three of the 68 routes in the 2026 coastal register touch the city. Ten are state lines that run all year. The other thirteen are commercial and carry no obligation to run at all.
Ten routes you can plan around, thirteen you cannot
The distinction that matters when booking a flight into Split is not between fast boats and slow ones. It is between lines under a public service obligation, which the state requires to operate, and commercial lines, which run when there is demand. Split has more of both than anywhere else in Croatia, and the ratio shifts sharply with the month.
| Category | Routes touching Split | Runs all year | Reaches |
|---|---|---|---|
| State lines (public service obligation) | 10 | Yes | Brač, Šolta, Hvar, Vis, Korčula and Lastovo |
| Commercial lines | 13 | No obligation | Adds through-services towards Korčula, Mljet and Dubrovnik |
| All routes touching Split | 23 | — | 6 islands on the guaranteed half |
Nationally, 17 of the 68 registered routes are commercial. Thirteen of those seventeen touch Split, which is why the city feels so much better connected in August than the state timetable alone would suggest — and why it feels so much worse connected in November than visitors expect.
Timing the arrival
The traffic figures put a number on that. Split handled about 578,000 passengers in June 2025 and 62,250 in November 2025, a factor of roughly 9. For comparison, Dubrovnik was at 49,275 that November and Zagreb at 337,851.
Split, mean days at or above 25 °C. Source: DHMZ (meteo.hr), climate normals 1971–2000, Split Marjan station.
The climate curve and the traffic curve are not the same curve, and the gap between them is the opportunity. Split records 15.4 days above 25 °C in September and 22.0 in June, so September retains two-thirds of June’s warm weather. The ferry season tariff runs to 27 September. Air traffic, though, has already begun to fall away by then.
Arriving in October on a July plan
The thirteen commercial routes are the ones that make the coast feel like a single network: the through-catamarans from Split down to Korčula, Mljet and Dubrovnik. None of them is required to run. When they stop, Split’s reach contracts to the ten state lines and six islands in the table above.
That is still a good holiday and a quiet one. It is not the itinerary that has you sleeping in three different island towns and finishing in Dubrovnik, and finding that out after the flight is booked costs a rearranged week.
If the trip depends on a through-boat, check the register before the flight. If it does not, Split in the shoulder is the strongest value on this coast.
What to decide before you book
- Is your island on a state line? Ten state lines reach Brač, Šolta, Hvar, Vis, Korčula and Lastovo.
- Does the plan need a commercial through-boat? Thirteen of the seventeen commercial routes in the register touch Split.
- How late in the year are you going? Air traffic at Split falls from about 578,000 in June to 62,250 in November.
- One base or several? Several bases only really work while the commercial lines are running.
Find flights and hotels
What do you need to work out next?
Flight into Split. These are the next three decisions.
Where to stay
Stay in Split or use it as a doorway?
Twenty-three registered routes touch the city; ten run all year.
Getting around
Which islands are actually on the network?
Brač, Šolta, Hvar, Vis, Korčula and Lastovo, on state lines.
When to go
Is September a real alternative to July?
Split keeps 15.4 days above 25 °C in September against 22.0 in June.
Planning
What can I do in five days?
Germany contributed about 98,000 passengers in March 2025, counted across all Croatian airports.
Passenger figures: Državni zavod za statistiku (DZS), monthly airport traffic releases. Ferry data: Agencija za obalni linijski pomorski promet (ZOLPP), 2026 state coastal line register and per-line timetables. Climate data: DHMZ (meteo.hr), climate normals 1971–2000.