There are no scheduled air services between Faro and Morocco.
To drive, would mean travelling via Seville, Spain to Algeciras a distance of about 500km. Ferry to Tanger and then a +- 600km drive to Marrakech.
The total distance by driving would be well in excess of 1000km each way.
The only possibility that might meet your needs would be to drive to Seville Airport. Ryanair.com have scheduled flights from there to Marrakech
