Can the primary and an authorized user choose different airlines for the $100 incidental fee reimbursement? There still would be a $100 cap total for both but would have the flexibility of two different airlines. I have chosen WN and had success with all reimbursements. My wife has a different AMEX card # as AU on my account. Would she be able to choose UA without affecting my choice of WN? Anyone have success with selecting different airlines for each card?