It could be for one of these reasons: The venue doesn't offer Ticket Transfer yet (we're working on that). The artist or venue turned Ticket Transfer off for that event/section. The event was canceled (ticket buyers get automatic refunds).
People Also Ask
With a non-refundable ticket, you can change your flight when you pay a change fee of $0-$400, depending on your travel route, plus the price difference.
In such unfortunate circumstances, you can contact the airline to request a free cancellation or to reschedule your flight in light of the circumstances. You will likely need to provide some form of documentation as proof of the situation such as a death certificate.