Security Checkpoint Wait Times
The TSA makes you click through a number of selections to get to your airport, but then you get a table of average and maximum delays at security checkpoints for each hour of the day at your selected airport for each airline.
The data are reasonably recent, but as with your stock broker and your life, historical performance is no guarantee of future performance. Note that this is not flight delays; these are delays at security checkpoints.
4 months ago