Airfare Is On The Up

Airfare is getting more expensive. I’m using the SFO-EWR flight on Continental as my barometer. Flying on it in May of 04, the flight was $276. August of 04, it was $316. May of 05 it was $341. I’m looking for another flight in August, it’s up to $396. Ridicilous! What happened to the days of cheap flights?