 Onlines, piles of luggage. You might not be back till Monday. Millions of passengers feeling the fallout of the largest IT outage in history. People, flights canceled or waiting for a different flight. It's been stressful. Airlines struggle to get online. They couldn't get us out till Monday afternoon. Delta has scrapped at least one-fourth of its flights with the most disruption at Atlanta's airport. Half of United's flights are delayed with its Houston hub a trouble spot.