Usa 3000
I always check with USA3000.com. We fly out of St. Louis and the most we have paid is $500 roundtrip. In the off season we can usually get $99 each way ($325 with taxes). They have the $99 special more often flying out of Chicago. It is a 4 hour direct flight from St. Louis. The only problem is they sometimes only fly once a week but we can usually make it work.