there is more to it that united, there are FAA part 135 restrictions, a heavy fog that reduces visability would fuck the flight up. I know first hand that if a flight can fly legally it will, its not really the pilots descretion, its the FAA’s and the companies. He might have the final call, but its by the books. “i rather be on the ground wishing i was in the air, than in the air wishing i was on the ground” theres much more to this flying business than what weatherdotcom has to say.