On the other hand -- if US flies where you want to go and the price and schedule meet your needs then why not?

There is, of course, a risk that something bad will happen but if you use a CC you can get a refund and book it elsewhere. The best deals and the best schedules are available with a longer advance purchase window. There's plenty of time to rebook later if you need to but summer travel isn't likely to get cheaper or more conveinent as seats fill over the next couple of months...