I have a flight out of DFW at the beginning of February at 05:20 am. The airline states "Passengers with bags to check must check in at least 45 minutes prior to departure." Even though I will not have any checked baggage, I still plan on being there at least this early. I have not flown in a couple of years. The last time I flew I was told to be there 2 hours early, but it seems like I was able to get through security and get my ticket easily, and ended up setting in the terminal a long time waiting for the flight. Is this necessary to get there this early at DFW for this time of night? What is the latest reasonable time I could arrive and still make my flight?