Try Yapta.com for booking airplane tickets when prices are low. BUT, if you’ve already purchased tix and prices have dropped, the site tells you how to get airline refunds or vouchers. You can even have Yapta track flight prices and alert you when prices fall.
I just found this site even though it’s been around for 8 years. Can’t wait to use it!
Kidding below, it’s not about balloon travel. That would be cool, though.