

I can tell you about the last time I flew Spirit airlines. I was on vacation in a place with really nice weather. Back home also had really nice weather, and it was basically clear skies all the way in between.
However, there was a hurricane in Florida.
Spirit canceled my return flight about 12 hours in advance, and booked me on a flight for the next day. Never mind that my hotel reservation ended in a few hours, so I didn’t have a place to stay or a rental car planned for the extra day. They said they didn’t have to offer me anything because it was “weather related”, on account of the hurricane that was literally more than a thousand miles away from either my departure or arrival airports.
Would a different airline have handled it differently? I don’t know. I’ve had other airlines do a better job rerouting me after a cancellation, but the conditions were different. Regardless, I’ll not be giving Spirit any more of my money.
In this context, it means “Edited To Add”. I do wish they abbreviated it some other way, since “Estimated Time of Arrival” is a much more common meaning. I would accept “E2A” or something stupid, as long as it was more unique. Alternatively, they could just use “Edit:”.
Edit: added link.