Trying to book TLV-SFO for mid-December before the end of the month to get the double PQM promo and the prices seems to have spiked in the last couple of days showing no non-refundable tickets available.

Is this just because I'm trying to book on a Sunday and they'll release more seats on a Tuesday or something like that or am I destined to fly another carrier as they are now $300 more per ticket more than LH on the same route instead of being about the same like they were last week?