For travelers flying out of Denver International Airport TSA Security Wait Times can help prevent last-minute airport stress. The airport serves as a major gateway for domestic and international flights, which means security checkpoints can experience heavy passenger traffic throughout the day. Wait times typically increase during busy travel seasons such as summer vacations, spring break, and the winter holiday period. Passengers are generally advised to arrive at the airport at least two hours before domestic flights to allow enough time for security screening. Travelers who enroll in TSA PreCheck often benefit from shorter lines and quicker screening procedures.