Originally Posted by
Duke787
Book the CDG and then call within 24 hours to see if they can swap the first segment since you'll have the F one confirmed. If not your savings in APD can probably cover the cheap LHR - CDG
They won't see necessarily LHR-(FRA)-JFK availability if CDG-(FRA)-JFK is available. For Lufthansa it is two different fights. LHR-JFK and CDG-JFK, exactly the problem with married segments.
The Op could try to see if LHR-EWR is available through FRA, DUS or MUC. LH First on a 340 is actually as nice as on the 380 or 748. In fact I like it more.