 Long lines, 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.