Airtran was fine with us and we flew them a few times out of BWI. That was until a large group of us were coming home from a course in Orlando and there were weather problems along the east coast. Airtran had no control over that, of course, but the customer service communication breakdown was so awful and somehow we were the only planeful of people who had to sleep in the Atlanta airport. It a long, complicated story, but one hand in management didn't know what the other hand was doing. I'd rather pay a lot more for a ticket than fly Airtran now.