The Delta Blue card costs $0 and is a smart downgrade play

Описание: The Delta Blue is the only free Delta credit card — no annual fee, 2X on Delta and restaurants, 1X on everything else, 20% back on in-flight purchases, and no foreign transaction fees. But no free bags, no priority boarding, no Sky Club, no companion certificate. So who is it for? It's the perfect downgrade play after you grab a big welcome bonus on the Gold, Platinum, or Reserve. Here's how to use it.

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