The best month to fly between Manila and Dumaguete is September and the most expensive month to fly is December. (Average prices, based on 1886 datapoints.)
The best day to arrive at Manila is Tuesday and it would be best to avoid Thursday, as prices are on average 21.68% higher than on Tuesday. (Average prices, based on 15436553 datapoints.)
The best time to fly is at around 16. (Average prices, based on 12477 datapoints.)