Airline loyalty programs are devaluing as rising jet fuel costs from the Iran war drive a 21 percent spike in April airfares.Major carriers like United Airlines and Delta Air Lines have increased baggage fees while shifting toward dynamic pricing models that require more points for award tickets.Credit card issuers such as
American Express,
Chase, and
CitiBank continue to offer flexible rewards, though experts urge users to maintain zero balances to protect the overall value of their points.