If I get my ticket and check-in online, I will get a boarding assignment? If I just show up at airport to check-in, I will still get boarding assignement, just not as good as what I would have gotten? Is there ever a case where I will not get a seat? I'm flying Jackson, MS to MCO direct flight on a probably smal plane and don't care where I sit because it is a short flight and I am travelling alone. I'm worried because the trip back, I will not have online access to check-in. So, will I get a seat regardless of when I check-in?