On the Wednesday before March Madness, I'm killing time at O'Hare, waiting for a Frontier flight to SLC. I leisurely stroll by a Spirit gate and notice it is for a flight to Vegas. While standing there, a gate agent asks if I'm there for that particular flight. I say no and hear them give orders to close the door for boarding, though the actual departure was about 10-15 minutes away. About 30 seconds later, two men show up at the gate and present their Vegas boarding passes. Too late, they are told. According to Spirit, FAA regulations allow them to cut off boarding either 10 or 15 minutes prior to actual departure. Incredulous to the situation, these two guys tried everything possible to get on board. When that didn't work, they tried to get booked for the next flight out, only to discover nothing was available for a at least a day or more. Finally they just gave up and walked away absolutely demoralized. They probably had it planned out to arrive on the Wednesday night before and be ready to roll for the big day of Thursday basketball. What a disappointment to miss a flight by a few seconds and have a trip of this magnitude go by the wayside. I'm thinking they were probably sitting in the airport bar having a drink or two, thinking they were okay arriving at the gate a few minutes before take-off. Has anyone experienced this themselves?