Whole Foods isn't the only grocery option available to Amazon Prime members. Subscribers also have access to the online grocery store Amazon Fresh, which provides free deliveries to some locations.

Get unlimited access to United's airport lounges for less than the price of a stand-alone membership, along with free checked bags and a great rewards rate for United purchases. If you consider ...

Earn 2 miles per dollar spent on most purchases, and receive a slew of travel-related perks, including airport lounge access.