Who decides when it's safe for flights to operate during bad weather conditions?

While airports have control over operations, the ultimate decision about flight safety during adverse weather conditions is determined by pilots and airlines. As former NTSB Air Safety Investigator Gregory Feith explains, even if an airport is attempting to catch up on delayed flights, it's the airlines and pilots who evaluate whether it is safe to operate at that airport. This assessment process creates a dual responsibility system where airports manage the operational aspects while flight crews make the final safety determinations based on their professional judgment of weather conditions and aircraft capabilities.