Best Airline Co-Branded Credit Card (2020)

The Allegiant World Mastercard earns three points per dollar on Allegiant purchases (including air, hotel and car rental), two points per dollar on qualified dining and a point per dollar on everything else. Other perks include a 15,000-point signup bonus, BOGO vacation packages, priority boarding and a free beverage on every flight.
Photo courtesy of Allegiant Air

Budget-minded travelers who frequently fly Southwest Airlines benefit from the Rapid Rewards Premier credit card with benefits like no foreign transaction fees, a 65,000-point sign-up bonus, upgraded boardings, $75 annual travel credit, 20 percent off inflight drinks and wifi and a 7,500-point bonus after each account anniversary.
Photo courtesy of Chase

Travelers with a Citi/AAdvantage Platinum Select MasterCard get their first checked bag free for themselves and up to four companions, preferred boarding on American Airlines, no foreign transaction fees and 25-percent off eligible in-flight purchases. Cardholders earn double points when the card is used for American Airlines purchases or at restaurants and gas stations, and a point per dollar on everything else. Cardholders earn miles that count toward Million Miler status with their 2020 spending.
Photo courtesy of Citigroup

For fans of JetBlue, the JetBlue Plus Card offers six points per dollar spent on JetBlue purchases, two points per dollar at restaurants and grocery stores and one point per dollar everywhere else. Cardholders enjoy no foreign transaction fees, a 40,000-point sign-up bonus, free first checked bags, 50-percent-off inflight savings and a 5,000-point bonus on each account anniversary.
Photo courtesy of JetBlue

Frequent domestic travelers enjoy perks like priority boarding, free first checked bags and two annual passes to United airport lounges when carrying a United MileagePlus Explorer Card. The card comes with a 60,000-mile sign-up bonus, the chance to earn twice the points on flights booked through United and at restaurants and hotels, and a $100 Global Entry or TSA PreCheck fee credit.
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Miles racked up through the Alaska Airlines Visa Signature card can be redeemed on travel with over a dozen partner airlines. A 40,000-mile plus $100 statement credit sign-up bonus, discounted companion fares, no foreign transaction fees and a free checked bag for up to six passengers on the same reservation add to the appeal. Plus, Mileage Plan is one of the more generous frequent flyer programs and still awards miles based upon distance flown.
Photo courtesy of Bank of America

With the Citi / AAdvantage Executive World Elite Mastercard, frequent flyers earn two miles for every dollar spent on American Airlines purchases and one mile per dollar spent everywhere else. Additional benefits include Admirals Club membership, Global Entry or TSA Precheck application fee credit and 50,000 bonus miles with qualifying purchases in the first three months. 
Photo courtesy of Citigroup

Frequent Southwest Airlines travelers benefit from the Rapid Rewards Premier credit card – no foreign transaction fees, a 65,000-point sign-up bonus and a 6,000-point bonus after each account anniversary. Cardmembers earn two points per dollar spent on Southwest and partner hotels and car rentals, as well as a point per dollar everywhere else.
Photo courtesy of Chase

The United Club Infinite Card comes with a 100,000-mile bonus offer, United Club membership, a $100 Global Entry or TSA PreCheck fee credit, two free checked bags per flight and the chance to earn up to four miles per dollar on purchases.
Photo courtesy of United Airlines

The Southwest Rapid Rewards Plus Card earns users two points per dollar on Southwest Airlines purchases and partner hotel and car rentals, plus a point per dollar spent everywhere else. Cardholders earn 3,000 anniversary points as well. A limited-time 65,000-mile sign-up bonus sweetens the deal.
Photo courtesy of Chase