When your date of departure does finally arrive, you may wish to be able to use your e-cig prior to boarding, and most airports do have a vaping policy in place. Some airports are more lenient than others, but if your travel plans include an extended layover, it's best to plan ahead.
Plan Ahead and Arrive Early DEN has three security checkpoints. South Security is open 24 hours a day, North Security is open 4 a.m.-9 p.m. and Bridge Security is open 4:30 a.m.-6 p.m. Passengers should arrive in the terminal at least two hours in advance to ensure the smoothest airport experience.