American Express has announced a 40% bonus on Membership Rewards transfers to all of their Avios partners: British Airways Executive Club, Iberia Plus, and Aer Lingus Aerclub. The promotion runs through November 15, 2018. With the promotion, you will receive 1,400 Avios for every 1,000 Membership Rewards you transfer across all three programs.

The ability to combine points into a single program is one of the most valuable features of collecting Avios, particularly when you factor in Iberia offers some of the best value business-class awards to Europe. You can also transfer Ultimate Rewards, Membership Rewards, and Marriott Bonvoy points to top off your accounts.