Ferries from St Malo to Portsmouth 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 St Malo to Portsmouth in other seasons, ferry services are often still available.

Ferry travel from St Malo to Portsmouth on average typically takes 12h 20m. The earliest ferry usually leaves from St Malo at 08:00, arriving to Portsmouth at 07:00 The latest ferry departs at 20:31 and arrives at 19:20.