I have a return award flight from PEK to IAH connecting through SFO which just suffered a cancellation on the SFO-IAH leg and bumped me up to UA1604 leaving at 11:30AM. My arrival from PEK is 10:15AM. Now, this might be doable (any thoughts?) but we will also have 3 kiddos in tow, 3/4/7 y.o. Called United line and they won't change or reroute my return without a nice little change fee (it is an award ticket), but just a reassurance that 'they'll accommodate me if I'm delayed'. Is there any other way I can go about this, or should I be worried? If it was just me and the wife I'd go with the flow, but with kids, a few extra hours in an airport can really kill the mood.