Hi there, I'm a newbie who flies only once a year. I'm trying to book a fare that has a 90-day maximum stay restriction and a $200 after departure penalty where child/infant discounts apply (I'm traveling with a lap child). Here are the rules from ITA although my ticket is cheaper, but the rules match:

http://matrix.itasoftware.com/cvg/di...1787&J=3&AAD=0

Does the infant discount mean I would have to pay $220 total (not $400) to make changes? I use a booking website that has really cheap fares but the vendors on the phone always pull up the wrong fare, give me wrong info and quit before I can contact them again!