The American Express Membership Rewards cards can transfer points into AirTran or 15 other airlines.   
AirTran also has 2 branded Visa Cards.

To see every Frequent Flyer Credit Card and find your perfect match:
Launch the MARS Credit Card CalculatorTM
AirTran A+ Credit Cards
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Premier Rewards Gold Card
  • Earn 15,000 Membership Rewards(R) bonus points
    when you spend $1,000 in your first three months of
    Card membership    
  • Build up Membership Rewards points fast - earn 3X
    points on airfare, 2X points on gas and groceries, and
    1X points on everything else      
  • No annual fee for your first year of Card Membership;
    $175 thereafter   
  • Use Pay with Points at American Express Travel and
    fly any airline, anytime, anywhere, with no blackout
    dates or seat restrictions
Platinum Card® from American Express
  • Earn 50,000 Membership Rewards bonus points when
    you spend $1,000 in your first three months of Card
    membership    
  • Get up to $200 in Airline Fee Credits annually to cover
    incidental fees with your favorite airline       
  • Airport Club access for you and your guests            
  • Platinum Card Concierge is at your service 24/7 to help
    with gift buying, reservation making, and more           
  • FINE HOTELS & RESORTS program offers special
    upgrades and amenities at more than 600 locations
    worldwide
American Express® Gold Card
  • Earn 10,000 Membership Rewards(R) bonus points
    when you spend $500 in your first 3 months of Card
    membership - redeemable for select gift cards valued
    at $100!
  • The Membership Rewards program - Turn your
    everyday purchases into Membership Rewards points,
    and then redeem them for an amazing collection of
    travel, shopping, dining and entertainment rewards.
  • Gold Card Events - exclusive access to tickets for
    select concerts, shows, major sporting events, and
    more in cities nationwide.
  • Express Approval. Get a decision in 60 seconds.
American Express(R) Premier
Rewards Gold Card
Platinum Card(R) from
American Express
American Express(R) Gold
Card
American Express Membership Rewards Cards
Transfer 1,500 AMEX Points for 1 A+ Credit, or Transfer Points into 15 Different Airlines
MARS Frequent FlyerTM
Travel the World for Free!TM