Now through 12/31, American Express and British Airways are offering a 20% bonus when AmEx Card Members transfer points into Avios as part of the British Airways Executive Club. Travelers on British Airways can use Avios on reward flights with British Airways and oneworld partners and for one-cabin upgrades with British Airways, Iberia and American Airlines.
Also, starting today through 11/30, American Express and Virgin Atlantic are offering a 30% bonus when AmEx Card Members transfer points into Flying Club Miles.