Marriott International acquired Starwood Hotels & Resorts Worldwide on Sept. 23, 2016. On Aug. 18, 2018, the two companies merged their rewards programs. Members of Starwood's Preferred Guest program now can trade their points in for Marriott Rewards, at a 1-to-3 rate (one Starwood point equals three Marriott points), at www.marriott.com/marriott-rewards/connect-my-accounts.mi.
Points can be used to reserve a room at any Marriott, Starwood or Ritz-Carlton hotel.