The best month to fly between Singapore and Seoul is April and the most expensive month to fly is July. (Average prices, based on 1571 datapoints.)
The best day to arrive at Singapore is Thursday and it would be best to avoid Saturday, as prices are on average 19.89% higher than on Thursday. (Average prices, based on 1517 datapoints.)
The best time to fly is at around 3. (Average prices, based on 2913 datapoints.)