I was wondering why would it cost a lot to leave say on December 19th and return December 27th.

For instance SJC-ABQ is $330
SFO-JFK is $508

I thought the most expensive would be the weekend before the holiday and usually right after New Years etc. Most people take the two weeks except some companies would take Christmas and then a few days at New Years.

Is the increased prices due to the holidays. Does it mean the airplanes are full? You would think they would continue sales as its October and they want to fill up seats.

Thanks