LH has already started a summer F (A) class sale on 3 cabin flights (including flights operated by LX & UA). I don't normally EVER buy tkts more then 30 days in advance but as I will be in NY most of July, I checked the F fare from JFK - NICE & was able to book 2 tkts for us from JFK-FRA-NCE on LH returning thru ZRH on LX (both TATL flights in F) for $4600 each. Might not sound cheap but compared to the normal F fare on this route, it's over a 50% savings. They are running this sale from now thru July for flights from June - Sept (60 day advance).

** You have to be careful what flights you choose. They are selling 2 cabin on UA & AC as F at the same fare (JFK-FRA-NCE on LH 747 3 cabin is same price as EWR-FRA-NCE on a UA (LH code share 2 cabin)