Hi Danielle,
The ferry to the Aran Islands can take anywhere from 15 to 55 minutes, depending on where you depart from and which island you're visiting as you can see below:
From Doolin (County Clare)- Inis Oírr: about 15 mins
- Inis Meáin: about 25 mins
- Inis Mór: about 35 mins
From Rossaveel (County Galway)- Inis Mór: about 40 mins
- Inis Meáin: about 50 mins
- Inis Oírr: about 55 mins
Doolin is closer but can be weather-dependent. Rossaveel has more frequent service year-round. Let me know where you might be departing from, and if you want info on booking or getting there.
Cathaoir