No Annual Fee
United Gateway Card
The only airline card in this dataset with a $0 annual fee — ever. You earn 2X miles on United purchases and gas stations, and 1X mile on everything else. Miles go straight into your MileagePlus account. It's the right starting point if you want to build United miles without any financial commitment.
Simple Flat Earning
Southwest Rapid Rewards Plus Credit Card
A $99 annual fee with a straightforward earning structure: 2X points on Southwest purchases, gas stations, and grocery stores (first $5,000 per year combined), and 1X point everywhere else. Southwest bags fly free regardless of which card you carry, so this card's value is pure points accumulation and a 3,000-point anniversary bonus each year. It's the cleanest earning card for Southwest loyalists who don't need bag perks.
Best Value with a Fee
United Explorer Card
The annual fee is $0 the first year, then $150. In exchange, you get a free first checked bag for you and one companion, 2 United Club one-time passes per year, and 2X miles on United purchases, dining, and hotel stays. If you check a bag on a single round trip, the bag savings alone cover a significant portion of the annual fee — making this worth the cost for travelers who fly United even a couple of times a year.