Maybe you should have a citi card so you can check yourself.
It's on travel.
Weird, why do they advertise "Points are Worth 25% More on Airfare 60,000 points are redeemable for $750 in airfare
on any airline, anytime with no blackout dates when booked at thankyou.com If you don't have enough points to cover all of your airfare, you can also use a combination of points and your Citi PremierSM Card."