That "$61 mistake in Denver" line got me thinking about how the airlines actually WANT us booking early. Prices don't just go up as the date gets closer, they also spike when demand looks high, and a booked flight is one less seat they have to sell. So sometimes waiting isn't you being lazy, it's you calling their bluff. I've snagged cheaper fares two weeks out on routes where the plane was half empty. The 6 week rule works for holidays and popular routes, but for random Tuesday flights in off season, booking late can actually save you money.