Ferries from Turku to Mariehamn can peak at up to 1 daily sailings, Sailing frequency typically peaks in the summer months, with approximately 7 departures offered each week. While schedules may be reduced from Turku to Mariehamn in other seasons, ferry services are often still available.

Ferry travel from Turku to Mariehamn on average typically takes 5h 25m. The earliest ferry usually leaves from Turku at 08:45, arriving to Mariehamn at 14:10 The latest ferry departs at 08:45 and arrives at 14:10.