Zamboanga to Basilan by ferry takes at least 2 hours depending on the weather conditions.
About Aleson Shipping
Aleson Shipping Lines, Inc. is a shipping company based in Zamboanga, Philippines. Their services include routes to Sandakan, Malaysia, and over Dapitan City to Dumaguete City. They also ship cargo from Zamboanga City to Manila with twelve of their container carriers. Operator page