Hi-
I have a confirmed seat in C- it was upgraded using award mileage. I will be flying on an international flight from EZE to IAD ending up in LAX. I will be flying United on all legs. I've been reading alot about how bad connecting in IAD is especially if you have checked baggage. My question is if I miss my connection to LAX because of a delayed flight or slow baggage claim, etc- do I lose my upgrade?