If you have an American Express Marriott card, you can enroll your card between now and September 15, 2021. and earn 6x points (up to 4 additional points) for each dollar of eligible purchases on:
- Car rentals purchased directly from select car rental companies
- Flights booked directly with airlines
- Gas at U.S. gas stations
- Transit, including purchases on taxis/rideshare, parking, tolls, and trains
You can earn up to 10,000 points in each category for a total of up to 40,000 points through 9/30/2021.