I've found it really depends on the checkpoint-to-gate ratio of the airport. ATL is the absolute worst. There are three checkpoints for the entire domestic si

I've found it really depends on the checkpoint-to-gate ratio of the airport. ATL is the absolute worst. There are three checkpoints for the entire domestic side of the airport, two of which are often closed. Wait times are normally 45 minutes in the normal lines. There are 3 checkpoints for about 150 gates. FLL, OTOH, is one of my favorites. This is because the terminals don't have a central entrance, so there's a security checkpoint per 15-ish gates and some checkpoints actually serve fewer than 10 gates.