Google's data says 32 to 73 days out. For December 19 to 23 flights, that is October 7 to November 1.
Jet fuel is $4.71 a gallon, and airlines say they are cutting their least profitable flights.
The least crowded days in NerdWallet's TSA analysis. Mondays to Wednesdays run about 13% cheaper.
Halloween falls on a Saturday, so Friday, October 30 is the practical last day.
For a Tuesday, November 24 flight, the low point is October 20. See the full guide.