Other than the folks at RM, predicting airfare is near impossible. Right now, I'm looking to fly from JFK-SFO in April (specifically 4/15), but a one-way ticket is a little under $300 in Main Cabin. The fare class is K, which feels pretty high at the moment, especially since we're still pretty far out and the seat map is wide open--though I know that seat maps aren't reliable indicators of flight load/availability. (Full disclaimer: I know this is a premium route; at the same time, there's a ton of competition on this lucrative route.)

I'm wondering if I should wait and book this ticket or go ahead and pull the trigger now because the first three weekends (at least on Google Flights) have higher fares than previous and subsequent weekends. I wonder if this is because it's spring break?

I would appreciate any guidance/advice that you all might have.