Business-class flights to Europe from 27K points: How to maximize Amex’s 30% transfer bonus with Avios

American Express and Avios have teamed up to make Membership Rewards even more rewarding. Amex cardholders will receive a 30% bonus when transferring Membership Rewards points to British Airways Executive Club, Iberia Plus and Aer Lingus AerClub by Sept. 30. While Membership Rewards points typically transfer at a 1:1 ratio, the new Avios offer has a …