The airline, as of late yesterday afternoon, was still to obtain the all-clear to fly from Transport for NSW.

The uncertainty comes despite the airline successfully completing a “proving flight” from Narrabri to Sydney last Thursday under the Civil Aviation Safety Authority’s watchful eye.

CASA issued the Northern Territory-based airline with a new Air Operator’s Certificate that included the additional route yesterday afternoon.

But Transport for NSW was yesterday unwilling or unable to give ticket-holders any indication about whether they would be flying tomorrow.

“Transport for NSW is assessing a licence application for the Narrabri to Sydney route and has sought further advice from the operator as required by the licence application process,” a spokesman said.

Vincent Aviation is seeking an interim operating licence to service the route following the collapse of Brindabella Airlines last year.

In a show of confidence, a fortnight ago the airline announced flights would start tomorrow and issued tickets starting from $149.

If approved, Vincent Aviation’s interim operating licence will be valid until late March, at which time Transport for NSW will appoint a carrier to the route for four years.

It is the only airline to announce publicly its application to service the government-regulated route on the exclusive licence.