Currently, this route is only operated by Aegeon Pelagos.
The distance from Milos to Halki ports by ferry is 289 kilometres, that's about 180 miles or 156 nautical miles. However, the exact distance may depend on the route you take.
You can travel as a foot passenger or with your vehicle on this route.
The cheapest price for a one way crossing by foot in the summer is about 31 euros, and for a car with one person about 139 eurosClick Book Now and use the booking form to get the latest prices and see the real sailing dates for all ferries on the Milos - Halki route.
Easy trip. Everyone polite and easy. Hopefully will be back next year.