Get 30,000 bonus miles when you sign up for a American Express Gold Delta Skymiles Card and spend $500 within the first three months. That's among the best bonus offers we've seen at that that low of a spend threshold. You get Delta perks and savings including one free checked bag all Delta flights, zone 2 priority boarding and 20% off in-flight purchases. You'll also earn one mile for 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. If you own a business, double down and get two 30,000 bonuses via this offer for their business card.