A general miles rewards credit card should be a good option for you. There are credit cards with big sign up bonuses that are enough for a round trip economy ticket. These cards usually come with an annual fee, but regular miles rewards rate is one of the highest. And there are cards with smaller sign up bonuses and regular miles rewards. These cards often come without an annual fee. Another feature of miles rewards credit cards is no foreign transaction fee. Bearing all this in mind, you can choose a travel rewards credit card with a sign up bonus that is best for you.