FlyHawaii Airlines, which hoped to offer low-cost, inter-island turbo-prop flights early next year, has shuttered its offices and let go nearly all of its one-time work force of about 20 employees.

FlyHawaii officials closed their Topa Financial Center offices on Tuesday and disconnected the phones, leaving two or three key employees left.

James Delano, FlyHawaii's CEO, did not return messages left on his cell phone.

FlyHawaii's future became uncertain when Phoenix-based Mesa Air Group announced plans in September to begin inter-island service, causing FlyHawaii investors and officials to postpone their plans.