For the price the Citi AA Executive Card offers the best. Enroll the company in the AA Business program. Pay $175 for 3 frequent flyers. Everyone gets unlimited access to Admiral Clubs - no need to worry about Day Passes not being honored (which is a frequent occurrence) I also believe Mileage and Loyalty Points earning benefits are better than the business card. You have to link the business card to a business which can conflict with the AA business program. OMAAT: A thorough comparison of the 4 co-branded (soon to be 5 when Barclay's is out of the picture) would be quite beneficial.