Hi Detulelya!
Though I'm no travel expert, I fly kinda frequently, and I feel the same way about USair and would not recommend them to anyone. I've flown USair twice, and it was terrible each time. Poor customer service, dirty planes, and so-so prices etc. Our carrier of choice is Southwest, but flights on Sundays are somewhat limited, therefore, we're flying Airtran. I can't offer a qualified opinion yet, as we're not flying 'til May I'll. I'll let everyone on the board know how it went. One of the things that I like about Airtran, is that you can get your seats assigned on check-in, thus avoiding the SW "cattle drive" They've purchased brand new Boeing 717's, and that's what they'll be flying out of BWI. I've talked to several people who've flown Airtran, and were quite happy with them, however, I'll know for sure in a couple of months. Hope this helps!!