Both AA and DL incidents were due to weather. ON AA flight was flying MIA-IAH and houston had huge flood. It was a night flight, so I had to go next morning. Entire plane not originating in MIA was given hotel and meal. ON DL was flying dfw-cvg-roc. DFW had sever thunderstorms and I missed last flight from cvg-roc. Was given hotel and meal in cvg. I know airlines are required to do nothing in weather case, but from my expereince they have done much more. Didn't even need a hotel from NW, but meal and worldclub pass would certainly help kill an 8 hour delay.