I've used ThankYou points to top off my award balances in programs like Singapore Airlines and Flying Blue.
Brad's Deals Editor Mark,
Earn 60,000 bonus ThankYou® Points after you spend $4,000 in purchases within the first 3 months of account opening with the Citi® Premier® Credit Card. You'll also earn 3X points on travel, including gas stations, 3X on restaurants and supermarkets, and 1X points on all other purchases. 60,000 points can be transferred to participating airline loyalty programs. I personally like their relationship with Avianca Lifemiles. There are no foreign transaction fees on purchases. The annual fee is $95.