I couldn't in April. If you're staying onsite though, you can just charge to the credit card linked on your account and then go to the front desk if your hotel and pay the balance off with the gift cards. You cannot put the gift card directly on your account though. I didn't have any issues, just make sure you do it no later than the day before you leave as the balance posts to your credit card that night. Also, if you charge $1500 or more, I think it posts regardless of what day of your vacation it is. I think it's something like $1500 for value, $2000 for moderate, and $2500 for deluxe, but don't quote me on that.