Join Date: Dec 2009
Location: Gran Canaria, Singapore, Surfers Paradise
Programs: KrisFlyer Gold to Silver to Blue, Finnair Silver, Royal Caribbean Diamond, GHA Platinum
Posts: 5,500
This is an normal thing, LH often sells flights from other European cities to SIN cheaper than directly from FRA/MUC to SIN.
Same with BA, usually a lot cheaper to get a C seat from Rome to SIN via LHR than just form LHR.