Do some due diligence on airline policy before you fill out your/loss value form, particularly with regard to the need for receipts and items which may not be covered. Be thorough - international coverage may vary from place to place. IMO if you pay "all of the taxes and fees" with a credit card, then you paid for the ticket with that credit card and are eligible for insurance - same for vouchers, when you pay the difference. But there is some debate on the issue, and you may want to search FT for other information.