Good price for return flights to Singapore including 23kg baggage for November and Janaury. The Luthansa return flights are from London Heathrow with one stop via Munich (short layover). Deal link goes to Flight Scout powered by Skyscanner which shows the different dates available, flights are booked directly with the airline Lufthansa e.g. not via a travel agent.
Also if you have a bit of time its worth spending a bit of time in Changi Singapore airport which has been voted one of the worlds best and has a number of free attractions.
From £386 return - London to Singapore including 23kg luggageMainly January dates, a few in November. Some dates in October may become available.
Flights booked directly at Lufthansa from £386 return