Update: My transfer took two days. I made the transfer on December 18 and received the miles on December 20. Yours may take more or less time.

Starpoints (or SPG points) are the points earned from the Starwood Preferred Guest® Credit Card from American Express and Starwood Preferred Guest® Business Credit Card from American Express.

Starpoints are the most valuable mile or point in my opinion--worth about 2.5 cents each.

They can be used for free hotel nights, complete vacations, discounted hotel nights, or transferred to airline miles with over 30 airlines.