KLM is the worst airline.

My husband and I arrived at the airport 40 min before our flight was supposed to depart. They didn't let us do our check in. On top of that, they made us pay for a new ticket in order to leave Amsterdam. I feel ripped off, paying 400 euros to go to Vienna. We paid less from Atlanta to Frankfurt. Beware if you fly with KLM!! I never heard of paying for a new ticket, the airlines usually bump you to the next flight. I learned my lesson, and I will never fly with KLM ever again.