How far ahead and what days are you traveling and how many days apart is your start and return trip. I fly RDU -> SFO regularly. If I'm 21 days out and my trip is 3 days or more I can get it for $500 - $600. If I reduce it to 2 nights it goes up to nearly $1000. So "cheap" tickets still exist but they're much harder to find than they used to be.