A few major points: the person who did this neat little comparison - nice job by the way - looked on all different days of the week. Oct
Oct 23rd and Nov. 7th were Wednesdays, Nov. 24th was a Thursday, and Dec. 16th was a Friday. It's
It's well-known that tickets prices change, often dramatically, during the week. They are generally lowest Tues (sometimes also Mon and Wed) and gradually rise to highs on Fri and Sat. It would be more efficient to compare the price always on the same day - so always on a Tuesday but different weeks, for example. Secondly
Secondly, it makes little sense to say "the Dec. 23rd ticket might have cost $229 if I have booked it Oct. 23rd" based on the reasoning that "now it's Nov. 23rd and the price of a Jan 23rd ticket is $229." A Dec. 23rd ticket will likely to be higher than a Jan. 23rd ticket no matter WHEN you book it. Even if you book it in January of the previous year, it's just more expensive to travel around a holiday because there is more demand at that time (i.e. airlines can get more money for those tickets). It's not just about the span of time between when you book and when you fly. Actually, one of the best tips for securing a plane ticket at a low price is to AVOID the holidays - problem is, that's when most of us want to (or are able to) travel! Thus
Thus, the supply-and-demand nature of this aspect of flying holds more control over the price than the period of time between when you book and when you fly.