NEW: We compared TSA PreCheck vs. Clear, another membership that can speed up air travel. Here's what we found:
PreCheck:
*88% of travelers move through PreCheck in less than 5 minutes. (Clear didn't provide a number for comparison.)
*$78 every 5 years
*Requires application, in-person interview, background check and fingerprints.
*Part of the Department of Homeland Security.
Clear:
*$189 per year.
*Requires online sign-up, as well as an iris and thumbprint scan.
*Private company
