I am traveling to Europe in September. I can fly from Boston to Dublin on American Airlines for $558. Kayak has tickets available for the same flight for approximately $350.
My question is whether using Kayak is a good idea. I'm leery that they could sell a ticket for so much less than booking directly with American. Are there any down sides or things I should look out for if I use Kayak?
Thanks very much for your help with this.