Get 30,000 bonus miles when you sign up for the Delta Gold SkyMiles Credit Card from American Express and spend $500 in the first three months from account opening. That's one of the best sign up bonus miles offers we've seen with that low of a spend threshold. You'll also get Delta perks and savings like zone 1 priority boarding, 20% off in-flight purchases, and more. You also get one mile per dollar spent or two miles on Delta flights. Plus, there's no annual fee for the first year. If you keep the card after year one, a $95 annual fee applies for each additional year, but saving the cost of checked baggage fees more than makes up for it (APR variable 15.24%-19.24%).