I’ve been tracking Delta fares for years, and while the "Tuesday at midnight" myth is mostly dead, I still find the best luck booking on Tuesdays or Wednesdays. Last spring, I watched a flight to New York sit at $450 for a week; I checked again on a Tuesday afternoon, and it had dropped to $280!
The best way to do this is to use the "Price Graph" on Google Flights. It showed me that Delta often lowers prices mid-week when business travel bookings slow down. I’ve started setting alerts about two months out, and I almost always see a dip on those mid-week days before they spike again for the weekend crowd!
