Credit card offers change all the time, but the Citi Diamond Preferred and the Citi Simplicity Card are typically among those with the longest 0% intro APR offers on balance transfers. The Citi Diamond Preferred offers 0% intro APR on balance transfers for 21 months (then 18.24% - 28.99% (Variable)). The Citi Simplicity also offers 0% intro APR on balance transfers for 21 months (then 19.24% - 29.99% (Variable)).  The U.S. Bank Visa Platinum Card also ranks high as a balance transfer card since it offers 0% intro APR for 18 billing cycles (then 18.74% - 29.74% (Variable)). Other cards with decent intro APR offers include the Citi Double Cash, the Chase Freedom Unlimited, the Blue Cash Everyday Card from American Express, and the Wells Fargo Business Platinum Credit Card.