Unfortunately, there are no ferries from VG to Road Town on Sundays. Only Beef Island. And the Tola to STT ferries only leave from Road Town.

So, you will have to ferry from VG to Beef Island, than get a taxi from Beef Island to Road Town, where you can then catch the ferry from Road Town to STT.

For the VG to Beef Island ferry, there are 6:00am, 8:30am, 10:30am.

For the Road Town to STT ferry, I am seeing ferries running at 7:30am, 10:00am, 11:30am and 3:30pm.

I would be comfortable taking the 8:30am ferry to Beef to catch the 10:00am ferry to STT.

I would not be comfortable taking the 10:30am from VG to catch the 11:30 to STT