re: Airline CCs for low spenders

Where do you live and what airline has the best flight selection for that city? That would be a big factor for me.

If Delta, the card you mentioned is probably a good choice. If United, Chase runs a good offer periodically of 50,000 mile signup bonus for the United Explorer card. If American, Citi is currently running a 50,000 mile bonus for that card. If Southwest, Chase has an offer now for their Southwest card with a 50,000 point sigup bonus after $2000-2500 spend in the first three months.

I would also look in to cards like the Chase Sapphire Preferred or American Express Gold that give you points that can be transferred to multiple airline partners. I'm partial to the Chase Sapphire preferred myself since United and Southwest are transfer partners and I live in Houston which is a United hub.