Ferries from Chalki to Astypalea can peak at up to undefined daily sailings, Sailing frequency typically peaks in the summer months, with approximately undefined departures offered each week. While schedules may be reduced from Chalki to Astypalea in other seasons, ferry services are often still available.

Ferry travel from Chalki to Astypalea on average typically takes -. The earliest ferry usually leaves from Chalki at -, arriving to Astypalea at - The latest ferry departs at - and arrives at -.