Guayaquil bus station is a 15 minute walk from the airport. From the bus station you can catch a bus to Playas, which run every 15 minutes. The direct and faster bus to Playas terminates at Villamil but stops off at Playas. This bus is blue, the slower bus is yellow. Once in Playas you can catch a second bus (which is green) to Engabao which leaves from the same place the bus from Guayaquil drops you off. This bus also leaves every 15 - 30 minutes.