Amex Membership Rewards: 30% Transfer Bonus to Marriott Bonvoy

Amex is running a 30% bonus on transfers from Membership Rewards to Marriott Bonvoy, a rare boost if you have a Marriott stay in your sights.

• The offer: Transfer Amex Membership Rewards to Marriott Bonvoy and get 30% more points, through August 31.
• The math: Amex transfers to Marriott at 1,000 to 1,200 normally; the bonus lifts that to roughly 1,000 to 1,560 for now.
• The caveat: Worth it only if you have a specific Marriott redemption in mind. Marriott points are a lower-value currency, so don't move flexible Amex points on spec.
• How: Transfer through your Amex account; the points post when the transfer completes.