A couple who flew around the world for just $1,000 each through credit card rewards used 6 cards to do it

Courtesy of Alex and Erin Miller

Cheap flights can be made possible by signing up for the right credit card rewards programs, Alex and Erin Miller of Upgraded Points said.

• Cheap flights exist, if you know how to make the most of credit card rewards.
• Alex Miller of UpgradedPoints.com completed a trip around the world aboard luxury airlines with his wife Erin using the rewards programs from six primary cards.
• Below, those cards are listed along with his insight on which is best for hotels, dining, and airports.

Any experienced fare hacker knows that strategically cashing in credit card rewards is the key to massively discounted airfare.

But with so many credit card rewards programs out there, where do you begin?

Business Insider spoke with Alex Miller of UpgradedPoints.com, who recently completed a trip around the world aboard luxury airlines with his wife Erin. Their eight-leg trip, valued at more than $55,000, cost the couple just $1,087 each.

Miller shared the six cards he used to pull off the trip of a lifetime, and wrote about his experience on his website. Read on to learn more about all six cards - and decide which one could work best for you.