I've just gotten ticketed for a conference in Paris this March. SJC-JFK-CDG on 4 March, then CDG-DFW-SJC on the 10th. Even though this is an N-fare (Sunday stay required and there's a penalty for changes <$150??> ), any suggestions for worthwhile changes to increase the milage? And any way to avoid the recently infamous AA/CDG experiences on the return?