One plus with AA Frequent Flyer Travel, (probably the same with CO) is that they will hold your reservation for 30 days which can also be extended. They did this for me for about 45 days while I earned the remaining 5K miles I needed for the free ticket to Belize last year. I also noticed that AA has dropped the amount of miles needed to 30K for Belize if you travel off season - early September to early November.