U.S. Bank, the fifth largest American bank by deposits, on Thursday announced it had added support for Apple Pay to its FlexPerks American Express (Amex) credit cards. Users of the FlexPerks Reserve Amex card, the FlexPerks Travel Rewards Amex card, and the FlexPerks Select+ card can immediately add their cards to the iOS Wallet program to gain Apple Pay functionality for online transactions, or retail store buying with an iPhone 6 or later, or an iPhone 5s paired with an Apple Watch.