The type of fare and the time of the cancellation determine Jetstar cancellation fee. Cancellations for regular economy (Starter fares) are usually non-refundable; the full ticket may be forfeited. You may be eligible for a partial refund or credit when using more flexible choices such as Starter Plus or Max fares; however, there will be a cancellation fee. International business class fares frequently provide refunds with less of a cancellation fee. For exact details, it's important to read the ticket rules or get in touch with Jetstar directly, as the specific costs and conditions may differ. https://sites.google.com/view/jetstarcancellationpolicy/home