Last week, I actually wore shorts and flip flops on a flight for the first time ever. However, it was on an AA Eaglet ATR-72 ANU-SJU so it didn't count. The next day I dressed up for my CO flight in F: faded blue jeans, cowboy boots and a long sleeved dress shirt that I actually ironed all by myself at the Caribe Hilton. When you fly F or BF on CO, it's gotta be special.