I see AA offers refundable fares. Are these really 100% refundable or is there a catch? When searching for flights you can check a box for refundable, so these are the fares I am talking about. I see they offer refundable flights to Europe. Where I live there are no direct flights to Europe, so this would start in USA, fly to another USA city and then fly to Europe from the connecting city. And when I search after selecting refundable, the results say " Please note connection time, Overnight flight or connection, The class of service you searched may not be available on one or more flights"

What does that mean? But if I go to check out, the final page says "refundable" on ticket purchase...

I am still worried there is some type of "catch" and if I need to refund these tickets, I won't get a refund, or will end up with a partial refund due to all kinds of hidden fees and rules etc... Thoughts?