There are two airlines offering flights to Singapore. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly. The cheapest date is currently 05 / Nov / 2019.
Make sure you use the search options above to search for flights to other airports in Singapore, not just Singapore Changi International Airport. The more options you look at, the better your chance of finding a cheap deal. Just so you know, the flight typically takes 21 hrs 5 mins.
There are about 20 flights via Singapore every week, so you have plenty of options.
If you're planning on going to Singapore during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.