The United Visa is finally an attractive credit card. There’s an offer for a 15,000 mile signup bonus. That, combined with double miles on all purchases means that you should probably get one right away. You don’t even have to fly — you just have to put $5000 on the card in the next couple of months (or spend $833 at specific restaurants and charge the meals to the card) — and you will have a free domestic roundtrip ticket.