The holidays are coming up and if you want to go somewhere, book yesterday. OK, that’s not necessarily true for all deals for all holidays — but if you haven’t made plans for Thanksgiving yet, get going. But first, let’s try to make all holiday travel at least a little cheaper, and always start by comparing airfares so you can be certain which airline has the best deal. Trust me, it varies.

1. Cheaper Halloween: Fly cheaper days

This holiday is the easy one because fares are cheap in October and can be made even cheaper. Plus, Oct. 31 falls on a Monday this year, so arranging a cheap itinerary is relatively easy. Just remember the cheapest days to fly are usually Tuesday, Wednesday and…