If you have a farther distance to travel (Puerto Escondido, Puerto Angel, San Augustinillo, Mazunte, etc.) then you may want to take a taxi to the bus station in La Crucecita, which is in the opposite direction, and take a first class bus from there. Or walk to the highway from the airport (about 1 block) and catch the local bus to Pochutla. There will also be collectivos (a shared taxi) cruising by which charge a little more than the bus.
You could also arrive by cruise ship, as Santa Cruz Bay has a pier for cruise ships, and you may spot one in port some days
