Originally Posted by sfvoyage
In your experience, was F always full in both legs of SQ25: JFK-FRA & FRA-SIN? If FRA-SIN is the more full sector, I can try for the later SQ325 FRA-SIN and stand by for SQ25.
In my experience, both sectors have been full to capacity. Remember that this is the only flight out of New York in which SIA offers F, thus many passengers will prefer to have the stopover in Frankfurt over the non-stop flight in Raffles Business Class. Good luck.