Prices will vary slightly but these are about right:
- Caleta de Fuste approx €15 each way
- Corralejo approx €50 each way
There are plenty of transfer companies who offer lower prices, also consider using the local buses.
Another option is to consider hiring a car for your holiday, the cost of a return taxi to Corralejo is not far off the cost of hiring a small car for a week, depending on the time of year as costs cary.