"If you pay a thousand dollars for the upgrade in each direction, you're not saving if one compares a DL TATL PS RT fare in class G to a DL TATL D1 RT fare in class Z. [Note that my statement is based on my perception of general DL TATL fares and not The JFK-CDG route in particular.]"
@
MSPeconomist :
1. I'm J outbound from JFK so I'm only upgrading the CDG-JFK return.
2. This is AF not DL.
3. I'm definitely saving at least $2,500 over J r/t as I compare the total each time (JFK-CDG-JFK) I look at the FCM price.