 I like to give myself two hours before boarding if I know if I think it's going to be busy. Experts say 90 minutes should be your baseline. You're waiting in TSA lines. Like, they're ridiculous all the time. Traveling at peak time? Add another 30 minutes. Dropping off a rental car? Add another 20. If it's a major airport, TSA says, that's another 20 for you. Some guests say they just prefer to prepare for the worst and camp out for three or more hours after all. I kind of just always enjoy the moment no matter what. The flight delay, it's okay. There's always something to do.