WTF happened to airline prices?

I used to be able to fly from California to Idaho round trip for like $64 non-stop at the lowest or like $130 on average, and now google flights is showing like $280 at the lowest all year long (it used to show the ultra cheap options if you looked a few months ahead). WTF happened?

Clarification Update: By "used to", I mean the past 2 years ive been doing so about once every 3 months.