I’m not a huge fan of Delta miles, at least relative to other US mileage currencies, although you really can make them work for you, and I do think that their current 100% bonus on transferring miles between accounts is a really good deal.
Via Lucky, American Express is offering 45,000 Delta miles after $3000 spend within 3 months for both their personal and their small business credit card.
The cards come with no fee the first year, first checked bag free, priority boarding, and the ability to purchase Skyclub day passes at a discount.
I usually only get excited about bonuses of 50,000 points or more, though the 45,000 mile offers are only close and the 55,000 offer takes quite a bit of spend. American Express doesn’t usually offer this many miles, the standard offer is 25,000 or 30,000 miles, so these are good offers. The 45,000 mile bonuses are explicitly supposed to last only though December 19, and the 55,000 mile small business offer I wouldn’t expect to stick around either.
American Express will generally give you a signup bonus once for each of their card products, though some have reported success waiting a couple of years and getting a bonus for a card they’ve had in the past.
These are worth considering, even though Delta miles aren’t the most lucrative currency, and especially if you don’t have your sites set on other American Express products currently.