PreCheck hours of operation at McCarran International Airport, by security checkpoint location:
A/B Checkpoint* 5 a.m. - 5:00 p.m.
C Annex Checkpoint 4 a.m. - 12 a.m.
C/D Checkpoint 4 a.m. - 12 a.m.
Terminal 3 Checkpoint 4 a.m. - 12 a.m.
*Sun/Mon and Thurs/Fri 0500-1700 Dedicated TSA PreCheck lane and screening. Any hours outside of the above listed hours passengers will receive expedited screening that differs slightly from standard PreCheck processing.