Contact the airline from which you purchased your ticket to find out its specific restrictions and documentation process for a refund when canceling an air ticket due to illness. If the airline permits cancellation based on your inability to fly because of the serious illness of an immediate family member, advise the airline representative and ask for guidance on the type of information needed to prove this. Typically, airlines will ask for the family member's name and familial relationship.
Acquire the documentation requested by the airline. For example, if you canceled because of your own illness, ask your physician to supply you with a letter on stationary with his letterhead, explaining why he didn't recommend travel due to your illness.
Complete any documentation as outlined by the airline in Step 1. This may include filling out a form supplied by the airline or writing a letter that outlines the reason for the cancellation. The airline will usually request the customer name as it appeared on the ticket, customer's contact information, ticket and flight number, date of travel and documentation.
Submit the refund request and supporting documentation to the airline by postal mail, fax or email and then contact the airline to confirm receipt of it of your request. If you postal mail the request, wait five to seven business days before contacting the airline to confirm.
Wait for a reply from the airline refunding the money or explaining why your cancellation situation doesn't warrant a refund.