You can take the Otobus from the Ortogar and it will take around 2.5 / 3.00 hours to reach Fethiye. There are numerous departures day and night.Cost is Peanuts.

Ian

There are regular bus services between Antalya Otogar and Fethiye Otogar.

Fethiye Seyahat departs Antalya at; 07.00,08.30,10.25,12.00,13.45,15.30,16.15,19.00.

Bati Antalya Seyahat departs Antalya at;
07.45,09.15,09.45,11.15,13.00,14.30,17.00,18.00,21.30.

The journey on these two buses costs 14 lira and takes between 3.5 and 4 hours.

Several coach companies such as Pamukkale go to Fethiye.
Pamukkale depart Antalya at;
10.30,12.30,23.30

The journey on the large coaches takes 3.5 hours the cost is around 20 lira.

Dolmuses can be found on the main road outside the Otogar in Fethiye which take you to the town centre. There is also a taxi rank.