American Express: Amex Membership Rewards to Marriott Bonvoy: 30% Transfer Bonus Aug 4 to Sept 3, 2026

American Express Membership Rewards 30% bonus when transferring to Marriott Bonvoy points. Normal rate is 1000 MR points gets you 1200 Bonvoys 30% bonus makes it 1560 Bonvoys I don't find this to be a spectacular value since Marriott hotels are so expensive in both cash or points but if you're swimming in points and you can find a hotel that isn't insanely expensive, then this is better than nothing.