The price for an upgrade from ZRH to ORD (via IAD) shows 20k miles/$550. I've not done miles/$$ buy-up on line before, so I'm not sure how this works. Is the 20k plus $550 for the entire return trip, or just ZRH-IAD segment TATL? If there is a way to tell, before I buy up, I'd love to know the secret. If the 20K plus $550 is for both TATL and IAD-ORD segments, that's probably a 'yes' on my part. I'm sure FTers can enlighten me. Thanks!