Hilton Honors has partnered with Citi since 2000 but is discontinuing its affiliated Visa credit card product with the company effective January 1, 2018.
American Express will become Hilton’s exclusive credit card partner in the United States. Hilton Honors Citi issued cards continue to earn points until 2018.
You can access Hilton Honors here.
Here’s statement from Hilton Honors:
There are still issues with Amex acceptance in the United States and greater difficulties worldwide (due to greater merchant fees that Amex charges). Few programs have more than one credit card partner, so this move by Hilton Honors does make sense.