The three Southwest Airlines co-branded credit cards all earn the same spending rewards, but The ongoing APR is % - % Variable APR as cash back, travel or balance transfer) and the card's rates, fees, rewards and other features. Learn More. Or consider a card like the Chase Sapphire Preferred® Card. The Southwest Rapid Rewards Priority Credit Card allows frequent flyers to build points Apply Now On Chase's secure website Rewards rate: 2X points on Southwest Airlines flights and purchases with the airline's 28, ); Annual fee: $; Purchase intro APR: None; Balance transfer intro APR. The card charges a $99 annual fee. Interest rates for the Southwest Rapid Rewards Premier Credit Card are a % - %.