A credit card with miles rewards that is issued by a major bank can be a good option for you. Miles rewards cards often come without annual fees, or fees are waived for the first year. Miles rewards cards are cheaper because they do not offer such benefits you might not use like priority boarding, lounge access, or first checked bag free. For example, you may consider the Discover it® Miles credit card. This card comes with no annual fee and no foreign transaction fees. You will earn unlimited 1.5x miles on all purchases. What is more, Discover will match all the Miles you’ve earned at the end of your first year (if you are a new cardmember). For example, if you earn 30,000 miles, you get 60,000 miles. Earned miles can be redeemed for flights with any airline, including Korean Air.