Purchasing RCI Air 2 Sea

We are considering purchasing our one way air through the RCI Air 2 Sea . Is it added to the price of the cruise and due at final payment or payable in full when booked? Also is the amount covered through the RCI insurance in case of medical reasons?

We purchased one way to Amsterdam for a trans-Atlantic cruise this past October. We picked out the flights we wanted and had to pay for them. We then received a flight locator number and went on the Delta site to select our seats. I do not believe the RCCL insurance will cover the airline tickets. We booked the cruise with our Visa card which included trip insurance through the credit card company. We then bought our own trip insurance through the Trip Insurance Store ONLY to cover the cost of the flights.