The best day to arrive at Guangzhou is Thursday and it would be best to avoid Monday, as prices are on average 486.37% higher than on Thursday. (Average prices, based on 209 datapoints.)
The cheapest airline flying from Guangzhou to Kuala Lumpur is AirAsia. They are 69% cheaper than MasWings. (Average prices, based on 209 datapoints.)
The best time to fly is at around 5. (Average prices, based on 412 datapoints.)