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.
You can use the filters on your search to see more flights and find cheaper rates – Singapore has more than one airport. So if you don't need to fly into Singapore Changi International Airport, it's worth checking your other options. The 15444 km flight usually takes about 22 hrs 55 mins.
There are about 16 flights to or 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.